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by Chris Woodford . Last updated: February 12, 2023.

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Center for Teaching

Digital timelines.

Tiki Toki Shot 1

Why Use a Timelines-Based Assignment?  |  Types and Examples of Timeline Assignments  |  Grading  |   Other Questions to Consider  |  Deciding on a Timelines Tool or Platform |  Outside the Box: Innovative Use of Timelines | Additional Resources

Why Use a Timelines-Based Assignment?

Timeline-based assignments can aid in a variety of learning goals, including:

  • Analyze non-linear relationships. Students often view history as distinctly linear: Event A happened, then Event B, then Event C. A linear view can make it challenging for students to identify relationships among events. By using spatial arrangements, categories, and color schemes to convey meaning, timelines can help students identify these complex relationships.
  • Develop historical context. Students sometimes have trouble seeing a particular text or invention or event in its historical context. By visually co-locating events that occurred concurrently in time, timelines can help students contextualize individual events, people, and inventions in relationship with others.
  • Analyze on a micro-, macro-, or mega- scale. Students sometimes view historical events on only one scale. In using a timeline, students can identify and analyze how seemingly isolated events relate to larger scale history or other micro-macro dynamics, such as local or regional histories in the context of broader national or worldwide events.
  • Focus on details. Large trends have little details that need to be examined. Use timelines to help your students discover how little details relate to the larger picture.
  • Develop arguments. Have students select several items from their timeline to develop an argument about change and/or continuity over time.
  • Compare time periods. Have students examine themes and concepts across two different time periods. An example used in a Religions of Japan course can be found below in the “Timeline as Analysis” section.
  • Document work through proper citations. Timelines are not just a product in themselves; they can also be a tool to help students learn essential research skills like citations of source material for individual entries.
  • Understand the development of scholarly discourse or historiography. Undergraduates can be unfamiliar with the idea of academic disciplines as culturally constructed and interpretive. By allowing students to use a timeline to plot the development of scholarly discourse, they can discover how scholars’ understandings of a key figure or subject changes over time.
  • Create a visual literature review. Much like understanding the development of scholarly discourse, timelines can also allow students to create a visual literature review, with an emphasis on development over time.
  • Visualize change (and continuity) over time and space.  Timelines might consider spatial arrangements, as well as temporal ones. A number of tools support mapping both time and space on a common visualization, including TimeMapper , Mapbox ,  Neatline , StoryMap JS , and  American Panorama .

As of this writing (June 2016), there hasn’t been any significant scholarship on teaching with online, interactive timelines — yet. We encourage you to explore ways to not only use timelines in your classroom but write about it too!

Types and Examples of Timeline Assignments

Timelines can serve many different purposes in a class, and may even take on multiple purposes. Here are some examples of timeline assignments:

Timeline as Archive

Ask students to research, select, and annotate timeline entries for the curation of a digital timeline of events and artifacts. This kind of archival work requires a number of valuable skills—finding and evaluating sources, curating for relevance and interest, tagging by category or theme, citing and linking appropriately.

Cryptography: Timelines in a Math Course

Timelines_Bruff_example

Type: Collaborative class timeline using  TimelineJS  (2015 version) and the  SIMILE project’s  Exhibit and Timeline scripts (2010 version) (all students contributed to the same timeline)

Course: Cryptography first year seminar, which focuses on both the mathematics and history of cryptography

2010 Assignment: Students contributed entries to a Google spreadsheet, which dynamically populated a timeline . Bruff considers the experiment a “moderate success” — he ended up with 121 entries in 7 different categories (such as ciphers, culture, people, unsolved, etc.), and some of his students reported the timeline as helpful in seeing connections among course material. He explains more about the project on his blog .

2015 Assignment: Bruff wanted his students to analyze the timeline more this semester. To do that, he asked his students to do two things: 1) select contributions from the 2010 timeline and improve them by verifying the description, including a credible source with citation and, where available, a link, and making sure there’s an associated image or other type of media with citation; and 2) add new contributions. At the end of the semester, students  wrote papers  that identified “lessons learned” from the history of cryptography for those interested in keeping secrets. The final student papers were strong, and students reported finding it useful to see new examples they had not discussed in class.

Interesting notes: Bruff credits the following people for his interest in digital timelines: “I first heard about digital timeline tools from Jason B. Jones , who had his students build a Victorian Age timeline back in 2008 using Google spreadsheets and the Timeline script from MIT’s SIMILE project . Jason worked with Brian Croxall on the project, and Brian put together a helpful tutorial for others interested in building collaborative timelines.”

Modern South Asia: A Timeline to Accompany HIST 1160

Dr. Samira Sheikh, Associate Professor of History and Associate Professor of Asian Studies Program, created a collaborative timeline with her students in a course on modern South Asia using Tiki-Toki .

Travel Log: Voyages of the British ship the Clarence (1858-1873)

Ian Petrie, Associate Director of University of Pennsylvania’s Center for Teaching and Learning, plotted the voyages of the British ship the Clarence (1858-73) with his Voyages of Discovery first year seminar.   Petrie’s students use multiple tools to chart the voyage including  StoryMapJS and a torque map made using CartoDB. 

Timeline for Analysis

Timeline for analysis.

Students can use timelines to conduct various types of analysis. This type of timeline requires that a timeline have a sufficient number of entries, either created by current or past students.

  • Ask students to identify patterns and themes among entries in a timeline.
  • Ask students to make comparison across different time periods in order to identify aspect of continuity and change.
  • Ask students to contextualize an entry by relating it to concurrent entries in order to develop historical perspective taking, understand ethical dimensions of history, and/or analyze causes and consequences. For example, you may ask students to consider a particular text written at a particular time. What political, religious, and artistic debates of that time might have influenced the writing of the text?
  • Ask students to evaluate the effectiveness of a law or policy by plotting the chronology of its development and subsequent trials and/or controversies

Love and Marriage Timeline in a Women and Gender Studies First Year Seminar

Example of a digital timeline used by Dr. Elizabeth Meadows

  • Link:  http://www.tiki-toki.com/timeline/entry/227613/Love-and-Marriage/
  • Type: Collaborative class timeline using Tiki-Toki (all students contributed to the same timeline)
  • Project: The class created a history of marriage in Great Britain and the US from 1500 to 2014.
  • Meadows wanted to trace “the shifting meanings and cultural functions of love and marriage through an archive of legal, religious, and cultural texts.” During the course of the semester, they added texts that served as commentaries on marriage. As a final project, they wrote individual papers connecting recent judicial rulings on same-sex marriage to entries on the shared timeline.
  • Grading: Students were graded on selected timeline entries, and they wrote a final paper that used elements of the timeline as evidence. The final project, which required the students to concur or dissent from recent judicial rulings on same-sex marriage using elements from the timeline, was graded based on the quality of the student’s analysis.
  • Privacy: Meadows chose to have the timeline be publicly available to help develop her students’ sense of ownership of the project. She allowed the students the option to post under their name or under a pseudonym for privacy purposes.
  • Interesting notes: Meadows found the final papers “enjoyable to read” and the students were proud of what they produced. From an instructor’s point of view, the Tiki-Toki platform was simple for her and the students to use and allowed for immediate course corrections when things went awry (such as when students needed to be reminded to use the publication date of a piece, not the date the anthology was published).

Religions of Japan Timeline: Thinking Thematically, Thinking Historically

Tiki Toki Shot 3

  • Course: Religions of Japan (approximately 30 students)
  • Type: Individual student timelines using Tiki-Tiki (each student created their own timeline)
  • Examples: Example 1 , Example 2 , Example 3 , Example 4
  • Project: Lowe’s course was a thematically-oriented course covering approximately 2,000 years. One of his main methodological goals was for students to recognize that religious traditions do not exist in a vacuum and instead must be studied within their context. This project asked students to make a multimedia (image and text) timeline on Tiki-Toki of four entries per week based on readings and lectures over the course of the semester. The students wrote papers based on their timelines, gave presentations, and used them as a study guide.
  • Students will be able to uncover patterns obscured by standard narratives in the historiography.
  • Students will be able to relate materials across weeks in the course by thinking about them synchronically (alongside other events from the same time period) and diachronically (within historical trajectories).
  • Students will develop a note-taking system for organizing the materials studied in the course. The timeline will act as a resource for study and help students synthesize information.
  • Students will practice writing regularly with low stakes writing assignments.
  • Timeline – 25 points total (15 points x 1 point per week and 10 points on overall quality of timeline): Students were required to write four timeline entries per week for weeks two through fourteen. On week 15, students were expected to edit and polish timeline entries for grading. Simply completing these activities will give you full credit for 15 points. Quality points were assigned based on the following criteria: number of entries (at least 60 total for full credit), accuracy, depth (minimum of three substantial sentences), use of media (when appropriate), quality of writing, and citations.
  • In-Class Presentation – 5 points total: Starting in week three, students delivered short presentations (3-5 minutes) where they summarized some of their new entries for that week, explained any patterns that they saw, and posed a discussion question.
  • Analytical Paper – 20 points total: Lowe gave students the option to answer one of four prompts. Students were required to use at least one primary and one secondary source and engage materials from multiple weeks of the syllabus. Additionally, they were required to include a one-paragraph post-script (not counted in the 4-5 page total) that explains how the timeline helped with the assignment.
  • Role of instructor and teaching assistant: Lowe designed the project and periodically checked the timelines to get a general sense of students’ posts. The TA provided the students with written feedback twice a semester and gave final grades on the timelines. Lowe graded the final papers that came out of the timeline. Lowe and his TA divided grading and feedback responsibilities for the in-class presentations.
  • Interesting notes: Lowe plans to revise the presentation component of his assignment because the presentations at the beginning of the semester had too few entries to be productive. He reflected, “I plan to revise this part of the assignment to have two whole class periods dedicated to student presentations at 1/3 and 2/3 of the way through the class. I will ask students to use their presentations to tell a story with a narrative based on their timeline. Many of the presentations devolved into simply sharing a few entries with no effort to connect them into a coherent story.”

Timeline as Argument

The selection and presentation of entries in a timeline can be used to support an argument. This type of assignment is best suited for individual or group projects where students add a series of entries to a timeline to support the argument they want to make — usually to a instructor-supplied prompt.

Screenshot of timeline created for Molvig's Scientific Revolution course

  • Links:  Example 1 ,  Example 2 ,  Example 3
  • Course: Scientific Revolutions
  • Type: Individual student timelines using Tiki-Toki
  • Project:  HIST 1510 The Scientific Revolution is a course where lecture material is presented thematically, rather than chronologically. This timeline assignment was an opportunity for students to re-organize the course material chronologically.  Students were asked to evaluate the concept of  “the scientific revolution” through this timeline, and alongside a short written explanation, they were asked to make an argument .  The display of names, events, and dates is not an objective representation, but rather an argument weighing relative importance. The p roject was the combination of a timeline and an accompanying essay.
  • Grading: Students were graded on a final paper that used elements of the timeline as evidence for their argument.
  • Privacy: Dr. Molvig allowed the students to choose how to self-identify online; some students chose to use a pseudonym for privacy purposes.

Timeline for Student-Created Content

Timeline for student-created content.

While the other examples listed here ask students to use external and existing sources, timeline tools can also accommodate student-created content. With this type of timeline, you can ask students to  use a timeline to plan a trip to Mars, hypothesize about the coming Singularity, create a travel-log, or map out an autobiography. Spatial elements may be a critical component to some of these timelines.

Timeline as Travel Itinerary

Screenshot of Tour Nashville Timeline

For example, i n a foreign language classroom, have students develop timelines to plan an itinerary for visiting a new place that they can describe in the target language. During an in-class presentation, the student can describe places to visit using the target language. This type of project can be connected to other work students do in the course, such as verb tenses, target vocabulary, and presentation skills. For instance, in a section on using future tenses, students can describe they places they will visit during an upcoming trip. Additionally, you can also have students create contingency plans (in case of rain or other delays), which would require students to use conditional or subjunctive tenses as well as weather-related vocabulary. 

See http://timemapper.okfnlabs.org/drpicardhis/nashville-travel-itinerary for an example of a timeline of places to visit in Nashville near Vanderbilt created by Danielle Picard, Senior Graduate Teaching Fellow and PhD Candidate in History.

There are a few strategies you can use to make grading timeline assignments easier:

  • Light grading vs. evaluative grading. You might grade timeline entries submitted by students only lightly, checking that certain components (title, description, image, citation, and so on) are included. Or you might assess the quality of timeline entries more rigorously, perhaps using an analytic rubric to differentiate among poor, acceptable, good, and excellent quality work in each component.
  • Grading all entries vs. grading a selection. You might not grade all entries a student submits to a timeline. You could ask the student to select a set of 3-5 representative entries, or you could select 3-5 entries to grade at random.
  • Grading the timeline vs. grading work based on the timeline. If you ask students to create a final paper or project based on their timelines, you might grade that final project instead of grading the timeline directly. If you do, it can be helpful to ask students to include a note with their final project explaining how they used the timeline. These notes can help you understand decisions students made not evidence in their final projects.

Regardless of the strategy you choose, you’ll also want to:

  • Discuss timeline entries with your students and establish criteria for what makes for a “good” entry. Consider developing a few “model” entries for your students and/or highlighting particularly good entries during class.
  • Provide feedback to students about their timelines or entries early in the course. This feedback can take the form of actual grades or could be comments. Some timelines (like Tiki-Toki) allow you and other students to leave positive/negative comments on entries that indicate questions or concerns you may have.

Other Questions to Consider

How do i incorporate the timeline into class time.

Some suggestions include:

  • Display the timeline on the projector during class, and refer to entries as you lecture. Particularly if you noted common themes arising in your students’ entries.
  • Encourage students to be creative and include pictures, video, music or other media that relates to the topic in their entries. You can then display or play clips in class.
  • Share a few example entries with the entire class and discuss what makes them “good” entries.  There’s also value in having students revise entries during class, perhaps working in groups, or contributing their first entries to a shared timeline during class, when you can troubleshoot.
  • Ask students to present elements of their timelines to the class. They can describe the trends they see in their entries, provide some ideas of the analysis they may do in their final paper, or perform some other presentation reflective of the goals you have for the course.

Should students work collaboratively on a single class timeline or on individual timelines?

Working collaboratively or independently on a timeline depends on your goals for the assignment. For instance, you may want your students to learn from their peers and construct a timeline that everyone can use (like the example of Dr. Elizabeth Meadows’ Love and Marriage timeline, above ). Alternatively, you may want student to construct individual timelines for use in collecting sources and entries for their self-designed research projects (like the example of Dr. Ole Molvig in his Scientific Revolutions course, above ).

How private or public should my timeline be?

Issues around privacy, intellectual property, and audience will need to be considered when having students create or contribute to timelines. You’ll need to decide if the timelines should be limited to only the students in your class or be made public. Sometimes making a timeline public helps to raise the stakes for the students, knowing that anyone could read their work. On the other hand, students may be uncomfortable leaving their name attached to an online work for posterity. You’ll have to weigh these benefits and drawbacks when deciding to make student-generated timelines public or private. For instance, timelines on controversial topics created by first-year undergraduates might need to be private, whereas timelines created by seniors intended to be used by a specific audience (say, high school teachers) should be public.

You will also want to verify your university’s policy regarding online work, and in the United States, their guidelines for adhering to the  Family Educational Rights and Privacy Act (FERPA).  See here for Vanderbilt’s FERPA resources . The following guidelines, provided by the Vanderbilt Institute for Digital Learning, may be helpful:

  • Make participation requirements in online assignments very clear in the syllabus at the start of term. Not only will this set participation policies, it allows students to choose to enroll or unenroll in course with full knowledge of course requirements. You may take their continued enrollment as consent regarding your policies.
  • Encourage students to manage their own privacy settings. Giving students the choice of when to use an “alias” and when to publish under their given name not only gives them control of their personal information, it provides an exercise in digital citizenship and literacy.
  • If full participation under a given name is a necessary component of the assignment, have students sign  this consent form . Using this consent form isn’t required (see point 1 above), but it’s a good practice.

How are media handled by the timeline tool? Can students upload their own media or must they link to media already on the Web?

Each of the timelines tools handles media (images, video, audio, etc.) a little differently. Some tools require you to link to media that is already on the Web, while others allow you to upload them from your computer or smartphone. There are some workarounds to situations when a student wants to link to something that doesn’t already exist on the web (such as uploading an image to a image hosting site like Flickr), but you will need to consider if the media is infringing on copyright laws. See the CFT blog post on  Finding Non-Copyrighted Images for Presentations .

Deciding on a Timelines Tool or Platform

There are many different tools to choose from, some commercial others are open-source, including basic time-only tools like TimelineJS , Tiki-Toki , and Prezi , and tools that combine timelines with geospatial data like TimeMapper , Mapbox ,  Neatline , and  American Panorama .

Regardless of the tool you use, you will want to consider:

  • Learning Goals: What are your goals for using a digital timeline? Some tools are better at presenting entries linearly (useful for making an argument or telling a story with a timeline), others make categories and tags easy to see (useful for identifying themes and comparing across contexts), and others offer robust search tools (useful when a timeline needs to function as an annotated bibliography).
  • Ease of Use: How much time will it take you to learn how to use the technology? How much time will it take your students to learn it? Do you need to have programming experience (like for Neatline) or is it designed for the novice user (like Tiki-Toki)?
  • Student Access: Will your students be able to access the technology while in class? From home? From the library? Is it accessible for all students in your class, including those with low or no vision or have auditory or other cognitive disabilities ?
  • Maintenance:  How easy is the timeline to maintain and upgrade?
  • Sustainability:  How long will this tool be around? For example, although Tiki-Toki is easy to use, you’re at the mercy of a third party for keeping your timeline up and running during and after the semester. An open-source option like TimelineJS gives you more control, but it also requires more set-up. Also, is it important that the tool allow you to export content for archiving purposes?
  • Costs:  What is the cost of the technology? Some are free, while others use a subscription-based model. Additionally, some need to be installed on a personal or university server, which could be an out-of-pocket expense for the instructor.
  • Interactivity and Collaboration : What kinds of interactivity (“liking” entries, comments and discussions associated with entries, and so on) does this technology enable? Between student and content? Between student and instructor? Between students? Between student and outside audience?
  • Privacy:  Does your plan for the technology allow students to protect their educational records or maintain certain levels of privacy? Would you be willing to let students use approved pseudonyms?

Outside the Box: Innovative Use of Timelines

  • Use non-time elements: Who says that timelines need to be measured by time? What if you used page numbers in a novel to map a narrative? For example,  Georgetown professor Sarah Stiles’ class created a timeline exploring a non-fiction book  using Prezi.
  • Create a big timeline. Assembling a timeline one entry at a time is fine, but what if we could use a bit of programming to import a large number of timeline entries from an existing database of some kind?
  • Span the timeline over multiple semesters. If you teach a class more than once, you may choose to have students contribute to the same timeline over multiple semesters. This can help your students see many models of what to include and give them more data for final projects. You can also have students edit existing entries to include missing data, citations, and media elements — all lessons in editing they can use for formal assignments. For an example of a multi-semester approach to timelines, see “ A Pedagogy That Spans Semesters ” by Benjamin Wiggins, director of digital-learning initiatives and lecturer in history at the University of Pennsylvania.
  • Use the timeline as a presentation.  Use timelines to organize a lecture or have students use it as part of an in-class presentation.
  • Create a timeline outlining a course’s content, readings, and assignments.  Use a timeline to experiment with alternative ways to view the progression of a course’s structure. Plot descriptions of lectures, readings, and other course material on the dates they will be discussed or due in class.

Additional Resources

Bruff, D. (2016) “Timelines, EdTech, and Thin Slices of Student Learning.” Agile Learning blog. Retrieved from  http://derekbruff.org/?p=3171 .

Groeger, L. (2012). “Some Thoughts on Timelines.”  The ProPublica Nerd Blog: Secrets for Data Journalists and Newsroom Developers. Retrieved from  https://www.propublica.org/nerds/item/some-thoughts-on-timelines .

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Explore inventors and inventions with your students by using lessons and printables to discover a world of unlimited possibilities. There are plenty of hands-on science activities to encourage creativity and engage students of all ages in learning. From catapults to artificial hearts, you'll find a variety of reading passages about the history and people behind innovations in technology. Additional resources include art activities, puzzles, and timelines.

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Creative Assignments: Map and Timeline Exercises

by Thomas Keith | May 7, 2019 | Instructional design , Services

technology timeline assignment

This post is an installment in an ongoing series that explores possibilities for creative classroom assignments.  We will showcase courses that have successfully employed creative assignments, and introduce tools and strategies that can help your students master material more fully and deeply, along with helping you to assess their knowledge and skills.

Previous installment: Podcasting

Why use creative assignments in the classroom?

Creative assignments fall into two broad categories: formative and summative.  Formative tools, such as collaborative mind mapping, allow students to explore ideas and concepts, systematize their thinking, and make progress toward mastery of new concepts.  Meanwhile, summative assignments can offer students the chance to create a lasting artifact that they can share with others, giving them a sense of meaningful accomplishment.  Such assignments are often both high- and low-stakes; they make it easy to hold students accountable for content mastery without adding large amounts of extra work.  Whether plotting a map, constructing a timeline, recording a podcast, or making a video, your students will be able to combine traditional academic research with practice in flexible, innovative thinking.

Those students who are less comfortable with the constraints of academic writing may find the challenge of creative assignments to be uniquely stimulating.   In addition, thanks to the many software tools now available for pedagogical use, your students can collaborate to create attractive, compelling projects, even when they are not in the same physical space.  In the process, they will acquire technological skills and competencies that are of great value in today’s wired world.

Map Exercises

Maps reach far beyond geography.  The movement of people, things, and ideas plays a role in countless intellectual disciplines.  As an easily understandable visual representation of such movement, maps can allow you to detect relationships and trends that purely abstract data might conceal.

In the past, the use of maps in the classroom has largely been limited to show-and-tell, but digital mapping tools have brought about a pedagogical revolution.  Students can make their own maps, “pin” information such as text captions or audio clips to locations on their maps, and, with certain tools, even track movement through space.

A number of easy-to-use tools for digital map-making are readily available.  Google’s GSuite includes My Maps, a powerful, intuitive app that allows you to select from multiple types of underlying map (political, satellite, terrain, etc.) and plot points or lines/routes.  You can make your map interactive by adding notes with text, images, video, or external links.  You can also create a Geo chart within Google Spreadsheets; simply open your spreadsheet and choose Insert -> Chart, then choose “Geo chart” or “Geo chart with markers” under Chart Type.  Geo charts are valuable for converting numerical data into an easily comprehensible geographical picture.  You can also create three-dimensional, immersive tours using Google’s Tour Creator .

A map of notable Civil War battles, created with Google Maps

A map of notable Civil War battles, created with Google Maps

Faculty and instructors at many major universities have had success with map assignments in the classroom.  Prof. Julia Gossard, now at Utah State University, introduced a map exercise into her course “Global Early Modern Europe” at the University of Texas at Austin to help her students see how early modern Europe interacted with the peoples and nations beyond the borders of the continent.  Not only did her students learn, through the process of mapping, some of the basic truths of early modern life – e.g. the great distances and lengthy times involved in voyages by sea – but the collaborative process of building a map and tracing connections brought the subject to life in a way that her students found enjoyable and fascinating.

Here at the University of Chicago, faculty members Niall Atkinson and Patch Crowley, both in the Department of Art History, have used digital maps in their courses to help their students contextualize art and architecture within their physical/spatial environment.  Prof. Atkinson was able to show his students the path that the marble used in Michelangelo’s sculptures took from the quarry to the sculptor’s studio, emphasizing the physical process of sculptural production and the costs and labor involved. His students also built a collaborative map of Renaissance architecture.  Prof. Crowley used images from Google Earth to introduce classroom discussion on how we use and interpret images, paying particular attention to the ways in which electronic media filter our perceptions and affect our viewing process.

Prof. Niall Atkinson discusses his use of mapping and graphical visualization tools in art history courses.

Further Resources: Maps

  • Ditch That Textbook offers creative ideas for exercises with Google’s My Maps app.
  • See also Richard Byrne’s “How to Use Google’s My Maps in Your Classroom” .

Timeline Exercises

Just as map exercises allow students to contextualize how people and goods move within space, so timeline exercises allow them to contextualize movement and change over time.  Unlike a paper timeline with its static string of dates, a digital timeline allows for interactivity: students can “walk” through a timeline and see how events in different parts of the world or different arenas of thought overlapped, or view media attached to dates (still images, audio, video) to engage with history in a rich way and learn content through multiple modes.

Many tools for digital timeline creation are available.  TimelineJS , from Northwestern University’s KnightLab, allows you to set up a basic timeline with nothing more than a Google Spreadsheet, add media from popular sites (e.g. Twitter, Flickr, YouTube, or Vimeo), and embed the code for your timeline in a webpage or blog to display it to the world.  TikiToki , another Web-based software platform, offers options such as banded timelines (multiple timelines displayed in parallel, making comparison easy) and 3D timelines.   As a simpler, quicker option, you can also create an annotated timeline as a chart type using LucidChart’s timeline template.  Because Google Suite is engineered to make collaboration easy, this option works well for group assignments.

Timeline exercises are increasingly being used in higher education in creative and stimulating ways.  In her “Foundations of Western Civilization” course at Utah State University, Prof. Julia Gossard has her students create a timeline of the history of food , using TimelineJS, so they can understand the vital role that agriculture and fluctuating food supplies have played in the course of human history.  Here at the University of Chicago, the students in Christopher Dunlap’s Spring 2016 LACS course “Sciences as Solutions to Latin American Challenges, 1500-2000” used TimelineJS in conjunction with the University’s blogging platform, Voices, to build an interactive, multimedia timeline of the history of science and technology in Latin America (site requires CNetID and password to view).

Further Resources: Timelines

  • Vanderbilt’s Center for Teaching offers valuable advice on how to craft effective timeline assignments.
  • For practical insights into what makes timeline assignments successful, see also  Derek Bruff’s “Timelines, Ed Tech, and Thin Slices of Student Learning”.

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49ers STEAM education

Course: 49ers steam education   >   unit 3.

  • Technology advances
  • How technology impacts the game

Activity: Wireless technology timeline

Introduction, project overview, materials needed.

  • Computer or handheld tablet
  • 11X14” poster paper
  • Colored pencils
  • You must have a minimum of six (6) different pictures, dates and important events related to your technology
  • Make your timeline as colorful and vibrant as can be! Be creative! You can make items “pop” off the page using a balance of two and three dimensional objects if you choose
  • You can either complete the timeline on poster paper or create it digitally on your computer or tablet
  • Count the number of segments that your timeline will showcase
  • Simply draw a straight line either vertically or horizontally with a ruler and divide it into the number of equal segments that are needed to adequately share your information
  • Lay out where the dates and events would fall on the timeline and understand how you would like to label them
  • For example, you can write on the timeline, type out labels on your computer and print them out on colored paper; and even color-coordinate labels by the period of time
  • What need is being met by your technology?
  • What item(s) satisfied this need prior to your invented item?
  • Describe the various ways your item is being used today in football.
  • Predict how the technology may be used in the future (whether in the game or elsewhere).

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Technology over the long run: zoom out to see how dramatically the world can change within a lifetime

It is easy to underestimate how much the world can change within a lifetime. considering how dramatically the world has changed can help us see how different the world could be in a few years or decades..

Technology can change the world in ways that are unimaginable until they happen. Switching on an electric light would have been unimaginable for our medieval ancestors. In their childhood, our grandparents would have struggled to imagine a world connected by smartphones and the Internet.

Similarly, it is hard for us to imagine the arrival of all those technologies that will fundamentally change the world we are used to.

We can remind ourselves that our own future might look very different from the world today by looking back at how rapidly technology has changed our world in the past. That’s what this article is about.

One insight I take away from this long-term perspective is how unusual our time is. Technological change was extremely slow in the past – the technologies that our ancestors got used to in their childhood were still central to their lives in their old age. In stark contrast to those days, we live in a time of extraordinarily fast technological change. For recent generations, it was common for technologies that were unimaginable in their youth to become common later in life.

The long-run perspective on technological change

The big visualization offers a long-term perspective on the history of technology. 1

The timeline begins at the center of the spiral. The first use of stone tools, 3.4 million years ago, marks the beginning of this history of technology. 2 Each turn of the spiral represents 200,000 years of history. It took 2.4 million years – 12 turns of the spiral – for our ancestors to control fire and use it for cooking. 3

To be able to visualize the inventions in the more recent past – the last 12,000 years – I had to unroll the spiral. I needed more space to be able to show when agriculture, writing, and the wheel were invented. During this period, technological change was faster, but it was still relatively slow: several thousand years passed between each of these three inventions.

From 1800 onwards, I stretched out the timeline even further to show the many major inventions that rapidly followed one after the other.

The long-term perspective that this chart provides makes it clear just how unusually fast technological change is in our time.

You can use this visualization to see how technology developed in particular domains. Follow, for example, the history of communication: from writing to paper, to the printing press, to the telegraph, the telephone, the radio, all the way to the Internet and smartphones.

Or follow the rapid development of human flight. In 1903, the Wright brothers took the first flight in human history (they were in the air for less than a minute), and just 66 years later, we landed on the moon. Many people saw both within their lifetimes: the first plane and the moon landing.

This large visualization also highlights the wide range of technology’s impact on our lives. It includes extraordinarily beneficial innovations, such as the vaccine that allowed humanity to eradicate smallpox , and it includes terrible innovations, like the nuclear bombs that endanger the lives of all of us .

What will the next decades bring?

The red timeline reaches up to the present and then continues in green into the future. Many children born today, even without further increases in life expectancy, will live well into the 22nd century.

New vaccines, progress in clean, low-carbon energy, better cancer treatments – a range of future innovations could very much improve our living conditions and the environment around us. But, as I argue in a series of articles , there is one technology that could even more profoundly change our world: artificial intelligence (AI).

One reason why artificial intelligence is such an important innovation is that intelligence is the main driver of innovation itself. This fast-paced technological change could speed up even more if it’s driven not only by humanity’s intelligence but also by artificial intelligence. If this happens, the change currently stretched out over decades might happen within a very brief time span of just a year. Possibly even faster. 4

I think AI technology could have a fundamentally transformative impact on our world. In many ways, it is already changing our world, as I documented in this companion article . As this technology becomes more capable in the years and decades to come, it can give immense power to those who control it (and it poses the risk that it could escape our control entirely).

Such systems might seem hard to imagine today, but AI technology is advancing quickly. Many AI experts believe there is a real chance that human-level artificial intelligence will be developed within the next decades, as I documented in this article .

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Technology will continue to change the world – we should all make sure that it changes it for the better

What is familiar to us today – photography, the radio, antibiotics, the Internet, or the International Space Station circling our planet – was unimaginable to our ancestors just a few generations ago. If your great-great-great grandparents could spend a week with you, they would be blown away by your everyday life.

What I take away from this history is that I will likely see technologies in my lifetime that appear unimaginable to me today.

In addition to this trend towards increasingly rapid innovation, there is a second long-run trend. Technology has become increasingly powerful. While our ancestors wielded stone tools, we are building globe-spanning AI systems and technologies that can edit our genes.

Because of the immense power that technology gives those who control it, there is little that is as important as the question of which technologies get developed during our lifetimes. Therefore, I think it is a mistake to leave the question about the future of technology to the technologists. Which technologies are controlled by whom is one of the most important political questions of our time because of the enormous power these technologies convey to those who control them.

We all should strive to gain the knowledge we need to contribute to an intelligent debate about the world we want to live in. To a large part, this means gaining knowledge and wisdom on the question of which technologies we want.

Acknowledgments: I would like to thank my colleagues Hannah Ritchie, Bastian Herre, Natasha Ahuja, Edouard Mathieu, Daniel Bachler, Charlie Giattino, and Pablo Rosado for their helpful comments on drafts of this essay and the visualization. Thanks also to Lizka Vaintrob and Ben Clifford for the conversation that initiated this visualization.

Appendix: About the choice of visualization in this article

The recent speed of technological change makes it difficult to picture the history of technology in one visualization. When you visualize this development on a linear timeline, then most of the timeline is almost empty, while all the action is crammed into the right corner:

Linear version of the spiral chart

In my large visualization here, I tried to avoid this problem and instead show the long history of technology in a way that lets you see when each technological breakthrough happened and how, within the last millennia, there was a continuous acceleration of technological change.

The recent speed of technological change makes it difficult to picture the history of technology in one visualization. In the appendix, I show how this would look if it were linear.

It is, of course, difficult to assess when exactly the first stone tools were used.

The research by McPherron et al. (2010) suggested that it was at least 3.39 million years ago. This is based on two fossilized bones found in Dikika in Ethiopia, which showed “stone-tool cut marks for flesh removal and percussion marks for marrow access”. These marks were interpreted as being caused by meat consumption and provide the first evidence that one of our ancestors, Australopithecus afarensis, used stone tools.

The research by Harmand et al. (2015) provided evidence for stone tool use in today’s Kenya 3.3 million years ago.

References:

McPherron et al. (2010) – Evidence for stone-tool-assisted consumption of animal tissues before 3.39 million years ago at Dikika, Ethiopia . Published in Nature.

Harmand et al. (2015) – 3.3-million-year-old stone tools from Lomekwi 3, West Turkana, Kenya . Published in Nature.

Evidence for controlled fire use approximately 1 million years ago is provided by Berna et al. (2012) Microstratigraphic evidence of in situ fire in the Acheulean strata of Wonderwerk Cave, Northern Cape province, South Africa , published in PNAS.

The authors write: “The ability to control fire was a crucial turning point in human evolution, but the question of when hominins first developed this ability still remains. Here we show that micromorphological and Fourier transform infrared microspectroscopy (mFTIR) analyses of intact sediments at the site of Wonderwerk Cave, Northern Cape province, South Africa, provide unambiguous evidence—in the form of burned bone and ashed plant remains—that burning took place in the cave during the early Acheulean occupation, approximately 1.0 Ma. To the best of our knowledge, this is the earliest secure evidence for burning in an archaeological context.”

This is what authors like Holden Karnofsky called ‘Process for Automating Scientific and Technological Advancement’ or PASTA. Some recent developments go in this direction: DeepMind’s AlphaFold helped to make progress on one of the large problems in biology, and they have also developed an AI system that finds new algorithms that are relevant to building a more powerful AI.

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Technology Timeline Assignment

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TechnoTimeline

Illustrate the significance of historical events. Design an innovative graphic organizer in Google Slides or PowerPoint.

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TechnoTimeline

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Students create a timeline that explains significant events. Using either Google Slides or PowerPoint, they organize information in chronological order. The timeline activity can be used to identify important events, develop an understanding of a historical period, study changes over time, or analyze causal relationships. Timeline lesson plans integrate technology with history, geography, or social studies.

  • Unique Timeline Lesson Plans for Kids Increase student engagement with a one-of-a-kind technology project. Students use presentation software to explain the importance of a remarkable person, time period, or event of their choice. Hook student interest and build computer skills.
  • Teaching with Timelines Integrates Social Studies and Computers Kickstart an interest in history. Boost critical thinking skills as students study a significant milestone or notable figure in time. They plan and arrange research findings, analyze, and determine salient facts, then produce a graphic organizer in a slide show timeline. Teaching a timeline activity helps students to connect historical events and understand chronological information using a graphic display.
  • Build Essential STEM Skills with Graphic Organizers for Students Develop key technology skills for careers of the future. Teach computer, curriculum, and personal skills all in one fun project. Students learn advanced presentation skills, engage in the inquiry process, and cultivate core soft skills such as communication, organization, problem solving, and confidence.
  • Complete Digital Resources for Teachers TechnoTimeline includes everything you need: Teacher Guide and Student Workbook in PDF format, Summary of Skills, Checklists, Assessment Tools, Templates, and a variety of samples to inspire and motivate young learners.

Examine timelines to gain an understanding of how a graphic organizer summarizes key events.

Formulate a plan for building a timeline. Select a timeline type and determine a topic.

Research significant events. Organize findings in a document.

Customize a slide for a timeline. Set the slide size, layout, and theme. Apply a slide background.

Emphasize a critical moment or turning point. Illustrate timeline events using pictures.

Self-evaluate the timeline using a checklist. Revise the content and design.

Peer review a friend's timeline. Comment to offer feedback. Use suggestions to improve timeline.

Celebrate a historical period. Print the timeline or present information to an audience.

  • Is it Significant? Learn to judge the importance of events.
  • Drawing Workshop: Practice drawing and formatting shapes.
  • Highlight Events using Saved Images: Use design tips to work with images.

NOTE: Assignment titles and sequence vary slightly between the Microsoft and Google versions. Select extension activities may not be available for all product versions.

Timeline lesson plans begin with samples to inspire students. Next, they research a topic and record findings using an organizer. Once the important moments have been pinpointed, Google Slides or PowerPoint is used to create a graphic display. Upon completion, the sequence of events is shared with others. Topic suggestions are provided including autobiography, family, biography, historical, and book plot timelines. Graphic organizers such as timelines enhance the understanding of connections between significant events and people, visually showing time and causal relationships.

  • Understand the purpose of a timeline
  • Use technology to conduct research
  • Analyze data to recognize the importance of events
  • Organize events using a timeline
  • Form connections between people and events
  • Apply a slide background
  • Produce a timeline using shapes or a SmartArt graphic
  • Format objects to produce an attractive graphic organizer
  • Share a file and set permissions
  • Post and read comments

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5.0 Just want to say thank you for all of your assistance. I love the units and my students really enjoy them. Y. Yancey, Clarksville, TN, USA, West Creek Middle School November 01, 2016
5.0 TechnoTimeline was a hit with my 8th grade students in the Digital Literacy class. Students researched significant events that happened throughout the years on their birthday (month and day). I will definitely use this again with my students next semester! Thank you TechnoKids for quality curriculum! J. MacDonald, Acton, MA, USA, R.J. Grey Junior High School January 28, 2016

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  • Project management |
  • How to create a project timeline in 7 s ...

How to create a project timeline in 7 simple steps

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Wondering how to transform your project management game? Learn how to streamline your tasks and dependencies by creating an adaptable project management timeline that's suitable for any industry and profession.

Fret no more. This guide offers a comprehensive example of how to create a project timeline suitable for any professional, regardless of their job title, industry, or department. Follow these steps and learn how to build project timelines that put you in the driver’s seat and build your own project timeline template .

What is a project timeline?

A project timeline is an important project management tool that visually represents the schedule and details the sequence and duration of tasks. It breaks down a project into parts and supports effective workload management by using integrations such as a work breakdown structure (WBS). A project timeline is more than a static calendar; it functions as a dynamic guide that adapts to the project's developing needs, ensuring that goals are completed quickly and within anticipated timescales, whether in a major enterprise project or a small business initiative.

How to create a project timeline

Creating a project timeline is a structured process that lays the foundation for successful project execution. It begins with defining the project’s scope and objectives.

A good timeline not only displays tasks in chronological order but also incorporates critical elements like task dependencies, resource allocation, and milestones. 

This is where the functionality of the timeline comes into play. It should provide a clear, visual representation of the project’s flow and allow for easy tracking and updates. The timeline should be both comprehensive and flexible, able to adapt to changes while keeping the project on track.

1. Create a project brief

To keep all project stakeholders aligned on the plan, every project should start with a project brief . It serves as a roadmap and is a way to explain big picture details, like the purpose, goals, milestones, and vision of the overall project. Here are a few questions to answer in your brief:

What are your goals for the project, both internally and externally? What are the project deliverables?

Which internal and external stakeholders are a part of the project? What are their roles?

What is the timeframe for the project? What are the most important dates?

What is the project scope ? Do you have a project scope statement?

What are the key milestones of the project?

Let’s put this step into practice. You’re responsible for planning this year’s client appreciation dinner. Your personal goal for the event is to be as organized, productive, and efficient as possible . You’re confident you can do it, and understand it all starts by putting together a cohesive brief for your event. Your answers to the four questions listed above are:

What are your project goals, both internally and externally?

The internal goal is to plan a high-impact client event under $15,000. The external goal is to achieve a 50% RSVP rate and 80% attendance rate.

Which internal and external stakeholders are a part of the project?

The internal stakeholders are the event’s planning committee (John, Sam, Tara, Linda), the VP of Client Success, and the Marketing team. Externally, the stakeholders include all current clients, and certain vendors (catering company, event venue, etc.).

What is the time frame for the project?

The project planning kicks off on January 15, and the event will happen on August 30.

Which tasks should be considered project milestones?

Publishing the registration page, securing the venue, and signing certain vendors.

Once you have your project brief and goals outlined, you’ll be ready to work backwards and figure out all of the steps you need to take to get there, and you can start creating a project timeline.

2. List your to-dos

In order to have a successful project timeline, you’ll need to create a list of everything that will need to happen throughout the project planning process, all the way to your final deliverable, whether it is a report or an event. Think both big and small in terms of steps. Any tasks that will help you get your project completed on time and on budget should go on this list.

At this point, don’t worry too much about the order of all of your steps or when you need to get them done—we’ll cover that later.

For example, the breakdown for our client appreciation dinner might look like this:

Write an event plan

Finalize budget

Confirm event venue

Select catering

Choose event theme

Design creative concepts for event

Set up an RSVP page

Send invitations

Advertise event

Finalize presentations

Prepare all event collateral and swag

Create a day-of checklist

For longer or more complex steps, break them into smaller, easy-to-digest subtasks. Not only will it help you figure out the true scope of a step, but it’ll also ensure you don’t forget any small details and make tackling it more manageable.

In our event example, to make the "Select catering" step less overwhelming, we would split this part of the project into a digestible task list:

Create a list of possible caterers

Get quotes from each caterer

Compare quotes and menus

Meet with top picks

Choose caterer

Finalize contract

3. Estimate how long each step will take

Once you have a comprehensive list of every step in your project, you’ll allocate an amount of time each will take to complete. When doing this, balance giving your team enough time to get project tasks finished and staying within your overall time frame. Once you know how much time each task will take, you’ll be able to properly plan and sequence each task to create a project roadmap.

Continuing on with our client appreciation event example, let’s take the “Select catering” step, along with each of its subtasks, and estimate how much time the smaller tasks will take, in chronological order.

Select catering (9 weeks)

Create a list of possible caterers (1 week)

Get quotes from each caterer (3 weeks)

Compare quotes and menus (1 week)

Meet with top picks (2 weeks)

Choose caterer (1 week)

Finalize contract (1 week)

Based on our time projections, the process of selecting a catering company will take a total of nine weeks. By working backwards, you can determine when you need to start on this particular step and fill in your project timeline with actual dates.

4. Map out dependencies

As you’re running a project, some steps can be worked on simultaneously—especially if different teammates are responsible for each of the overlapping tasks. However, others cannot be started or completed until another step is finished. In other words, some steps are dependent on others getting completed first. For instance, you can’t order food before you’ve selected the caterer. This is one of the many reasons why a timeline is so important. Visually seeing each step, how the steps overlap, and the amount of time each one takes will keep you on course.

This is also the time to figure out who’s responsible for each step. Assigning who’s responsible for what to every part of the project early on will help you spot and adjust timing or resource conflicts, and avoid future surprises and delays. In Step 6, you’ll learn how to share your project timeline with those involved, making responsibilities crystal clear.

One of the tasks for our example event is to send out invitations. While this particular step seems like an easy one, there are several other things that need to happen before we can even think about sending invitations. The invites must be designed, and we can’t design them until a theme has been chosen for our event. One task needs to occur before another starts. For example:

Event theme (Event Planning team) → Design concepts (Linda) → Choose design (Event Planning team) → Create invitation (Linda) → Send invitations (Tara)

It’s worth the time to map out each dependency and the sequence (or order) of each task. You’ll quickly start to see your project puzzle coming together. Deciding who will do what is critical as well. Who will be working on finalizing the event theme? Who will design the invitations? Don’t wait until it is time for a task to start before assigning it to someone—get everything ironed out early to avoid conflicts or hiccups.

The good news is the invitation process and catering selections can happen at the same time, which will be shown on our project timeline.

5. Create your timeline

Are you beginning to visualize what your project timeline could look like ? While it’s not practical to keep that image (and all those tasks and due dates) in your head, it is realistic to get them down on paper (or on screen). Your first instinct might be to open up an Excel spreadsheet or Microsoft presentation—but wait. Since neither were designed to plan or manage projects, you’ll run into some challenges you could avoid by choosing a better tool .

Instead, opt for a project management tool that’s designed to build and manage project timelines —like Asana. Not only will it save you time drawing your timeline (since you won’t have to attempt to hack merge cells and add formulas to turn a spreadsheet into a project timeline), it will allow you to continue managing your timeline after the project kickoff. Dedicated project management software allows you to easily adapt your timeline as you work, and update your stakeholders on changes and progress in real time.

With the right tool, your timeline will be tied to your underlying work and will always stay up to date. It can be the difference between a project running on track and one going haywire.

How to create a timeline in Asana

Use Asana’s Timeline feature to create your own project schedule :

Enter all of your project steps as tasks in a list

Add start and end dates to each task

Add a task owner for each one

Draw dependencies between tasks

Click "Timeline" view to see your list translated into a visual timeline.

[Product UI] Product marketing launch project in Asana (timeline view)

Tip: If you’ve already created your plan in a spreadsheet, you can quickly import it into Asana using our CSV importer integration , and skip to step four.

Project timeline templates to get you started

The easiest way to set up a project timeline quickly is to start with a project template . Below are a couple of project templates, created by Asana, that you can use now. Each type of project starts as a List View, but you can click the "Timeline" tab to convert it into a Timeline:

Product marketing launch template

Event planning template

Product roadmap template

General project plan template

6. Share it with stakeholders

Remember when you added a list of all project stakeholders to your brief at the very beginning of this process? Now that you’ve built your timeline, it’s important to share it with everyone involved. We can promise they will be thrilled to see how clear your plan is. The easier you make their part of the project, the more kudos will come your way throughout the process.

When you use a project management tool to build your timeline, sharing it is quick and seamless. Forget emails and multiple docs—in no time, your stakeholders will know who’s doing what by when.

For the client appreciation event, we will want to share our timeline with everyone involved in the entire project, not just those who have immediate responsibilities. At any time, someone will be able to track their part of the project and its dependencies without having to ping you for information.

7. Manage and adapt as you go

If you’ve ever worked on any project, you know things don’t always go as planned. However, when you’re prepared to adapt, changes don’t seem so difficult to handle. Timelines aren’t just great for planning; they will also help you adjust as delays or changes inevitably happen.

Moving tasks around doesn’t have to be daunting or disrupt the entire project. If one part of the project runs into a delay, as the project owner, you will have clarity on the impact of the rest of the project. Then, you’ll be empowered to move things around accordingly so the overall project can still move forward productively.

As The Balance Careers notes, project changes can be managed within their own specific steps, but once the change is final, it’s time to update your timeline. Because timelines go out of date quickly when plans change, relying on a project management tool , rather than email or spreadsheets, offers a major benefit. As the project owner, it’s your responsibility to communicate to all stakeholders what the single source of truth is (your timeline) and make sure it’s always updated.

Take immediate action. As soon as the change is confirmed, update your timeline to reflect it.

Notify stakeholders. Anyone that is affected by the change to your project timeline should understand how it impacts them and be able to visually see the change on the project timeline.

Determine the impact. Once your timeline is updated, you’ll be able to see if there are time periods that are overcrowded and stakeholders that have too many tasks. Can you move a task to ensure more time? Can someone else take over that responsibility or lend a hand?

To wrap up our event example, let’s say you managed to choose a caterer for the client appreciation dinner. You’re about to finalize the contract when a call comes in that the catering company double-booked themselves. Unfortunately, you must find a new catering company.

With a timeline, it's easy to adjust due dates for any task or any team members that are impacted by this change. The positive part of this challenge is that we’ve already gone through several of the initial tasks and can see that reflected on the timeline. While this is a frustrating problem, it feels more manageable because our timeline has kept us organized and on track.

Types of project timelines

Project timelines are as diverse as the projects themselves. The reason for this variety lies in the distinct nature of each project, where factors like scope, complexity, industry, and team size dictate the most suitable timeline format. This diversity ensures that every project can have a timeline tailored to its specific needs.

Choosing the right type of project timeline is an important step in project management. The key is to assess the project’s requirements and consider factors like: 

Project duration

Level of detail needed

Team's working style 

For instance, projects requiring close monitoring of deadlines might benefit from a Gantt chart, while those emphasizing flexibility might opt for a Kanban timeline. Additionally, the availability of project timeline software and tools should also be considered to ensure compatibility and ease of use.

Knowing you've selected the right type of timeline often comes down to its effectiveness in project execution. A suitable timeline will streamline the planning process, facilitate clear communication among team members, and provide a realistic overview of the project’s progress. 

If the timeline allows for easy identification of bottlenecks , supports effective time management , and aligns with the team’s workflow, it's likely a good fit for the project.

Gantt chart timeline

A Gantt chart is a popular project timeline tool that provides a visual overview of tasks scheduled over time. It helps teams see the start and end dates of project phases, helping with time management and identifying potential bottlenecks.

For example, a Gantt chart can be used to manage deadlines and identify potential delays in a construction project by outlining stages such as design, procurement, and construction.

Vertical chart timeline

This timeline is a variant of the traditional Gantt chart, displaying tasks along a vertical line. It's effective for smaller projects or when you need a concise list of tasks without detailed scheduling.

In event planning, such as organizing a conference, a vertical timeline can efficiently display the sequence of tasks like venue booking, speaker confirmation, and marketing.

Historical timeline

Particularly useful in educational or retrospective projects, a historical timeline outlines key events in chronological order. When dealing with complex projects, this format can help streamline the visualization of project phases.

A historical timeline, for instance, could be used to help with the educational component of a museum exhibit project by listing important historical events or eras in chronological order.

Kanban timeline

Kanban timelines, inspired by Kanban boards , focus on the progress of tasks from "to-do" to "done." They're excellent for teams emphasizing teamwork and agile methodologies, where tasks move through different stages.

For example, software development teams often use a Kanban board to track the progress of features from conception to implementation. 

Critical Path Method (CPM)

The Critical Path Method is a more sophisticated approach that identifies the sequence of interdependent tasks that affect the project's timeline. It's pivotal in complex projects where time tracking and precise planning are key.

In a big manufacturing project, for instance, CPM can identify and keep track of important steps like design, production, and quality control to make sure the job is finished on time.

Program Evaluation and Review Technique (PERT)

PERT is similar to CPM but focuses more on the time each task takes. It's beneficial in projects where time estimation is challenging by providing a project plan timeline that considers uncertainty.

In a research and development project, for example, PERT can be used to estimate the time needed for various phases like conceptualization, experimentation, and product testing.

Project timeline examples

Effective project timelines are more than just theoretical concepts; they are proven tools that drive successful project outcomes. They enable precise coordination, effective resource allocation, and timely completion of tasks.

A notable example is NASA's Mars Rover Curiosity Project. The mission's success was heavily reliant on a meticulously crafted timeline, coordinating hundreds of scientists and engineers. This precise planning facilitated the rover's successful landing on Mars in 2012, demonstrating how a well-managed timeline can lead to extraordinary achievements in highly complex projects.

Project timeline example 1: Digital marketing campaign

In a digital marketing project, a Gantt chart timeline could delineate phases like market research, content creation, and campaign execution. The project team might use timeline tools to track critical tasks, ensuring effective time management when meeting campaign deadlines.

Scenario: A digital marketing team at a tech startup is launching a new app.

Market research phase: The team sets a two-week period for market analysis to understand the target audience.

Content creation phase: Over the next month, the team develops blog posts, social media content, and email campaigns.

Campaign execution: The final phase involves a six-week rollout of the created content across different platforms, with weekly reviews.

With the Gantt chart timeline, the team can see how each phase is progressing, adjust to delays in content creation, and move resources around more efficiently, all of which led to a successful campaign launch.

Project timeline example 2: Boutique retail business

For a small business project, a simple vertical chart timeline or a Kanban timeline might be more suitable. Businesses can use this kind of timeline to make project timelines that are easy to follow and keep up-to-date by showing important tasks like product development, marketing, and sales.

Scenario: A boutique clothing store is planning to expand its online presence.

Product development stage: Tasks include selecting new products and setting up an online store. Each task is moved from "to do" to "doing" to "done."

Marketing stage: This involves social media marketing and email marketing tasks, tracked similarly through the Kanban board.

Sales monitoring: The final stage tracks online sales performance and customer feedback.

Using a Kanban timeline, the store effectively handles its growth into e-commerce, keeping task management flexible and ensuring a smooth transition to online sales.

Common questions about project timelines

Knowing how to create a well-organized project timeline is a great first step towards understanding how to use this powerful tool, but you may still have a few more questions. You’re not alone. Here are answers to a couple common questions people have about project timelines:

What’s the difference between a timeline and a Gantt chart?

Gantt charts focus more on workflow and task dependencies. They are more linear and don’t account for changes or multiple things happening at once. Timelines are flexible and adapt easily to changes in project plans. They allow the workflow to be updated effortlessly. Both are organized as bar charts and serve as visual tools.

How can you track project progress, especially if you’re managing multiple projects?

[Product UI] Project portfolio for managing multiple projects (Portfolios)

This is tough to do in spreadsheets, but easier in a project management tool. There are multiple views to be able to see one project at a time, or you can manage multiple projects through a portfolio-style view .

In other words, you can visualize when you’ll have more time to work on specific tasks, and when you’re at capacity, you can adjust as needed to even out your entire team’s workload .

Create your next project timeline confidently

It’s not enough to just come up with a project plan. Determining how to execute it is just as important . Developing a timeline of how the plan will evolve is critical to the planning phase and also makes managing the project more efficient.

Using this step-by-step process for every project management timeline will keep you on task and less stressed. Try it out, adapt it to your business, and share it!

To take your project timelines even further, create your next timeline using Asana .

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Technology Timeline Infographic Template

A Brief Timeline

This technology timeline infographic template is a great storytelling tool to engage your audience..

  • Design Style : modern
  • Colors : light
  • Size : Letter
  • Plan : free

Use this technology timeline template to tell any story quickly and easily. Customize it in just a few steps before you share it with your team, share it online, use it in a presentation and more. What’s your topic of focus today? Consider your time frame, condense your points into five concise paragraphs and then add them by editing each text box. Put your creative stamp on it by applying a color palette unique to you. Use your brand colors, draw inspiration from color-matching principles, or even check out our blog page for design tips and inspiration. Then access our icon library to find awesome, illustrated icons that are highly detailed and eye-catching. These icons will easily attract your audience’s attention and give your timeline the professional look you want. That’s all there is to it! Let us know how your Venngage design experience went and if there’s anything we can do to improve it.

Explore more

technology timeline assignment

10 Engaging Ways to Create Timelines

  • Differentiation , Engagement , Planning , Reading , Social Studies

Do your students have to create timelines to meet academic standards? Check out these 10 different timelines that are sure to engage and motivate your students during social studies with this important reading skill!

Teaching about timelines is a skill that crosses into language arts, science, and social studies, at the very least. It is often found as a graphic source in nonfiction texts that helps students understand the material better, and students are often asked to create a timeline at some point during their schooling. So, why not get creative and make it engaging?

Do your students have to create timelines to meet academic standards? Check out these 10 different timelines that are sure to engage and motivate your students during social studies with this important reading skill!

When most teachers think of timelines, they are likely thinking of just a traditional number line with increments displaying dates and an event. *YAWN*  While this is indeed a timeline, it’s less likely to engage a student, motivate them, and help them remember the content. That’s why I have 10 – YES, 10! – different timelines to share with you that your students can make!

Wait, what’s that? Ten timelines isn’t enough?

Okay, I’ll compromise: to keep this blog post from reaching novel-like proportions, I’ll only write about ten different timelines. However, if you’re in need of more timeline goodness, check out this bundle of TWELVE timeline activities !

I know, I know–now the ten different timelines aren’t nearly as appetizing, huh? Still, give ’em a read-through–I guarantee you’ll be able to save your timeline hunger here! Let’s get started.

The 10 Different Timelines

All of the timelines below share the same important information as a traditional timeline. They share the date of the event, along with what happened, and some even ask why it is important. Many request an illustration and, of course, require students to present them in chronological order. Teachers could even ask who was involved, where it happened, and so much more! The ideas are limitless!

1.)  The Puzzle Timeline.   Provide each student with one puzzle piece per event on the timeline. Inside the puzzle piece, have them illustrate the event along the top half and describe it along the bottom half. Include the date. Then, piece the puzzle pieces together into one long row. I would then glue them along a piece of construction paper for an adorable display. Then, you’ll end up with something like this:

Do your students have to create timelines to meet academic standards? Check out these 10 different timelines that are sure to engage and motivate your students during social studies with this important reading skill!

2.)  The Chain Link Timeline.   Provide each student with a strip of paper for each event (or construction paper, if you wish), and have students write about the event on the strip. If desired, you can have students illustrate the event, too. Then, have students link each chain event together to create a timeline chain.

Do your students have to create timelines to meet academic standards? Check out these 10 different timelines that are sure to engage and motivate your students during social studies with this important reading skill!

3.)  A Chain of Events Timeline.   If you don’t like the idea of an actual chain, but want the concept that they are all linked together, then have students write each event and date on a card and what happened at that event on another. Then, have students actually draw chains that link the cards together. See the picture below for a better understanding of what I’m trying to say. Haha.

Do your students have to create timelines to meet academic standards? Check out these 10 different timelines that are sure to engage and motivate your students during social studies with this important reading skill!

4.)  A Storyboard Timeline.   I love storyboards. Take a piece of paper and fold it into the number of boxes you need (based on the number of events). Then, in each box, write about that event. I always have my students include an illustration and a heading for each box. Since it is a storyboard, I try to have my students tell it in a story form, but they still must stick to facts. It can be very interesting. I have also gotten very creative, and we have used our fingerprints with this timeline. You can read about our fingerprint storyboards in this blog post .

Do your students have to create timelines to meet academic standards? Check out these 10 different timelines that are sure to engage and motivate your students during social studies with this important reading skill!

5.)  The Folded Cards Timeline.   Provide each student with an index card (or the like) for each event. Have them fold it in half and glue the back to a sheet of construction paper in a row (see the picture below). Then, on the outside, write the name of the event and the date. You can also have your students include an illustration if you wish. Then, on the inside, have students write about the event. It makes a cute display!

Do your students have to create timelines to meet academic standards? Check out these 10 different timelines that are sure to engage and motivate your students during social studies with this important reading skill!

6.)  The Old Fashioned Scroll.   I have students take a piece of paper and fold it in half “hot dog” style. Then, we glue it end-to-end so it is one really long piece of paper. On each end, we glue straws (though you can glue wooden dowels, Popsicle sticks, or any other materials) and leave a little space for rolling. After that, throughout the paper, we create our timeline. Sometimes we draw a traditional timeline, sometimes we use arrows;  it really just depends on our level of creativity!

Do your students have to create timelines to meet academic standards? Check out these 10 different timelines that are sure to engage and motivate your students during social studies with this important reading skill!

7.)  A Step/Layer Foldable Timeline.   I love foldables. I’m always looking for ways to incorporate those into my classroom, so you know I had to have some of them in this post, too!

Do your students have to create timelines to meet academic standards? Check out these 10 different timelines that are sure to engage and motivate your students during social studies with this important reading skill!

8.)  Foldable Timeline.   In this foldable timeline, students have the date on part of the fold, and then under it they can illustrate the event. The description of the event is to the right of the date. It can easily be glued into their notebooks.

Do your students have to create timelines to meet academic standards? Check out these 10 different timelines that are sure to engage and motivate your students during social studies with this important reading skill!

9.)  The Quick Note Timeline.   Each student receives a quick note sheet for each event in their timeline. Then, students complete the quick note, place two holes along the top and string them together for a cute “pennant-like” display.

Do your students have to create timelines to meet academic standards? Check out these 10 different timelines that are sure to engage and motivate your students during social studies with this important reading skill!

10.)  The Road Map Timeline.   In this fun example, students take a poster board or a piece of butcher paper and draw a road. Then, they create street signs to represent the dates and use cars to represent the event. In the example below, we made the cars so they lift up, and under them is where we described the event in detail.

Do your students have to create timelines to meet academic standards? Check out these 10 different timelines that are sure to engage and motivate your students during social studies with this important reading skill!

All in all, these timelines make for an exciting and engaging way to practice this important skill while motivating students. And, let’s face it, an adorable display!

Want to save some time teaching timelines?

While you can teach/make each one of these types of timelines in your classroom on your own, I created a Timelines Collection resource that includes ready-to-print directions and images, along with additional tips for you for not just the 10 mentioned above, but for TWELVE different engaging timelines. This low-cost resource is designed to save you a ton of time – whether you want to teach one timeline a month, have the students pick a timeline version as a project to present, or use it as center work. These are good for small group work, individual projects, or enrichment activities.

technology timeline assignment

What are you waiting for? Grab your copy and let’s make timelines engaging again!

technology timeline assignment

  • Engagement , Reading , Social Studies

2 Responses

Tammy, I love this post and your blog! So many fantastic ideas and resources. I’m in several FB groups with you. Hope to get to know you better!

Hi Susan! Thank you so much! I’d love to get to know you better too! 🙂

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Technology Timeline Assignment

Archie the first search engine.

Archie the First Search Engine

Tim Berners Lee Develops World Wide Web

First text message sent, toy story released: first computer fully-animated movie.

Toy Story Released: First Computer Fully-Animated Movie

GPS Goes Mainstream

GPS Goes Mainstream

Apple Releases the First Ipod

Apple Releases the First Ipod

Skype is Founded

Mark zuckerberg lauches facebook.

Mark Zuckerberg Lauches Facebook

Twitter is Launched

Nintendo launches the wii, list of sources.

research!rsc

Thoughts and links about programming, by russ cox, timeline of the xz open source attack posted on monday, april 1, 2024. updated wednesday, april 3, 2024., jia tan arrives on scene, with supporting cast, jia tan becomes maintainer, attack begins, attack detected, further reading.

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National Energy Technology Laboratory researchers utilize sorbents to extract solubilized rare earth elements from aqueous solutions.

The U.S. Department of Energy’s (DOE) Office of Fossil Energy and Carbon Management has announced that a NETL-led project focused on accelerating and de-risking critical minerals and materials (CMMs) technology development and commercialization will receive $75 million to develop the Critical Materials Supply Chain Research Facility (METALLIC), bringing the expertise of nine national laboratories to bear on the nation’s critical materials challenges.

CMMs are essential for developing nearly all modern technologies, including those for clean energy and national defense. However, the United States imports nearly all its CMMs from foreign sources, creating vulnerabilities in the supply chain. Establishing a secure, sustainable domestic supply of critical minerals from a broad range of sources across the country is crucial to the nation’s security and prosperity.

The METALLIC team led by NETL will establish a nationwide, federated set of critical mineral and materials capabilities by leveraging the unique capabilities of Ames National Laboratory (Ames), Argonne National Laboratory (Argonne), Idaho National Laboratory (INL), Lawrence Berkeley National Laboratory (LBNL), Lawrence Livermore National Laboratory (LLNL), the National Renewable Energy Laboratory (NREL), Oak Ridge National Laboratory (ORNL), and the Pacific Northwest National Laboratory (PNNL).

“This team represents the national laboratory system’s leading CMMs research capabilities,” said NETL’s Tom Tarka, who will serve as METALLIC director and lead principal investigator. “We intend to deliver the highest impact return on DOE’s investment by creating an innovative CMMs ecosystem to address supply chain issues.”  

The team intends to leverage fundamental capabilities of each lab, including CMMs process modeling and optimization (LBNL, NETL); artificial intelligence, machine learning and large language models for energy, materials and geoscience research (Ames, Argonne, LBNL, INL, NETL, ORNL, PNNL); life cycle analysis (Argonne, NETL, NREL, PNNL); data science and warehousing (NETL, PNNL); supply chain analysis and modeling (Argonne, NETL); and expertise in advanced CMMs alloys (LLNL), among other capabilities.

METALLIC will work to secure a domestic supply of CMMs by:

  • Accelerating deployment of novel processing technology. The developmental timeline of novel technologies will be shortened by providing facilities for diverse techniques and materials to be prototyped, tested and validated at multiple scales and in a variety of process configurations.
  • Designing new materials to support extraction from low-concentration sources. The team’s experience developing and validating materials for CMM extraction from sources down to parts-per-trillion concentrations will be leveraged.
  • Minimizing waste generation through process design. Low-environmental-impact approaches in CMMs manufacturing will be designed, CMMs intensity will be reduced, extraction efficiency will be improved, and the processing tolerance of mixed and recycled feedstocks will be increased.
  • Reducing CMM usage through advanced alloy development and manufacturing. In situ metrology will be used to characterize alloy properties as they are processed under far-from equilibrium conditions common in advanced manufacturing.
  • De-risking adoption of new technology by demonstrating success at various scales . Two technology readiness level groupings will be targeted in each supply chain area to de-risk adoption. Lower maturity research will validate aspects of technology performance, generate materials for testing in other centers, and determine readiness for further maturation. Higher maturity research will be designed to validate technologies in a more integrated context at scales relevant to industry.
  • Rapidly advancing technology from the bench to deployment for commercialization. Configurable testbeds will be deployed for validation and generation of relevant data at multiple scales and reducing scale-up time, uncertainty and risk to accelerate commercialization.
  • Supporting the establishment of domestic CMMs supply chains. The team will validate technology performance, perform testing in the context of other unit operations, and perform testing of processing technologies at scales relevant to industry to produce materials in volumes and sizes suitable for end-use technologies.

METALLIC will also support DOE’s Critical Materials Collaborative (CMC) activities across supply chain segments by unifying physical, computational and data capabilities into four centers: Feedstock Beneficiation, Extractions and Separations, Refining, and Alloy Development and Advanced Manufacturing. The team will implement targeted capability expansion for member labs and interface with CMC to create a nationwide resource led by NETL.

In addition to NETL’s broad intra- and extramural CMMs research, the Lab has a wealth of experience in leading large-scale, multi-laboratory and mutli-institution efforts such as the Institute for Design of Advanced Energy Systems; the eXtreme environment MATerials consortium; Subsurface Hydrogen Assessment, Storage and Technology Acceleration; the Process Optimization and Modeling for Minerals Sustainability initiative and more. The Lab has also more recently taken on a leadership role in the Critical Minerals Institute.

“NETL is also the only national laboratory that is both owned and operated by the U.S. government, which allows its researchers to apply the full weight of the government, irrespective of profit motivations, to build technology that will create an industry that does not yet exist in this country,” Tarka said. “Our efforts will lead to the technology that can spin off and seed the CMMs ecosystem, connecting the resources and manufacturers in this country and ensuring that each step in the supply chain is built here.”

NETL is a U.S. Department of Energy national laboratory that drives innovation and delivers technological solutions for an environmentally sustainable and prosperous energy future. By using its world-class talent and research facilities, NETL is ensuring affordable, abundant and reliable energy that drives a robust economy and national security, while developing technologies to manage carbon across the full life cycle, enabling environmental sustainability for all Americans.

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Trump’s social media company gains in its first day of trading on Nasdaq

Pedestrians walk past the Nasdaq building in New York on Tuesday, March 26, 2024. Donald Trump’s social media company begins trading publicly Tuesday. Trump Media & Technology Group Corp. was acquired Monday by a blank-check company called Digital World Acquisition Corp. Trump Media, which runs the social media platform Truth Social, now takes Digital World’s place on the Nasdaq stock exchange. (AP Photo/Peter Morgan)

Pedestrians walk past the Nasdaq building in New York on Tuesday, March 26, 2024. Donald Trump’s social media company begins trading publicly Tuesday. Trump Media & Technology Group Corp. was acquired Monday by a blank-check company called Digital World Acquisition Corp. Trump Media, which runs the social media platform Truth Social, now takes Digital World’s place on the Nasdaq stock exchange. (AP Photo/Peter Morgan)

FILE - The Truth Social account for former President Donald Trump is seen on a mobile device, Wednesday, March 20, 2024, in New York. Trump Media & Technology Group, whose flagship product is social networking site Truth Social, will begin trading on the Nasdaq stock market on Tuesday, March 26, 2024. The common stock of Trump Media & Technology Group will trade under the ticker symbol “DJT.” (AP Photo/John Minchillo, File)

Pedestrians walk past the Nasdaq building Tuesday, March 26, 2024, in New York. Trump Media, which runs the social media platform Truth Social, now takes Digital World’s place on the Nasdaq stock exchange. (AP Photo/Frank Franklin II)

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NEW YORK (AP) — Shares of Donald Trump’s social media company rose about 16% in the first day of trading on the Nasdaq, boosting the value of Trump’s large stake in the company as well as the smaller holdings of fans who purchased shares as a show of support for the former president.

Trump Media & Technology Group Corp. merged Monday with a blank-check compan y called Digital World Acquisition Corp. Trump Media, which runs the social media platform Truth Social , has now taken Digital World’s place on the Nasdaq stock exchange.

Shares closed at $57.99, up 16.1%, giving the company a market value of $7.85 billion. At one point the stock was up about 59%. Trump holds a nearly 60% ownership stake in the company , now worth about $4.6 billion.

Many of those investing in Trump Media are small-time investors either trying to support Trump or aiming to cash in on the mania, instead of big institutional and professional investors. Those shareholders helped the stock of Digital World more than double this year in anticipation of the merger going through.

FILE - Republican presidential candidate former President Donald Trump speaks after voting in Florida's primary election in Palm Beach, Fla., Tuesday, March 19, 2024. Trump’s return to the stock market could be right around the corner. All eyes are on a vote Friday by shareholders of Digital World Acquisition Corp., a shell company that is looking to merge with the former president’s media business. (AP Photo/Wilfredo Lee, File)

Truth Social launched in February 2022 , one year after Trump was banned from major social platforms including Facebook and X, formerly Twitter, following the Jan. 6 insurrection at the U.S. Capitol. He’s since been reinstated to both but has stuck with Truth Social.

On Truth Social Tuesday, users were posting about being shareholders or seeking tips on how to buy shares.

One user urged conservatives to “get behind the DJT stock and sent it over $100 per share” to “drive the liberals insane!” Another declared: “Get yourself a piece of #DJT stock if your a true MAGA supporter.”

A day earlier, Trump Media CEO Devin Nunes, a former House Republican, said, “As a public company, we will passionately pursue our vision to build a movement to reclaim the Internet from Big Tech censors.”

Despite the enthusiasm, investors could experience a bumpy ride. For one, they’re betting on a company with uncertain prospects of turning a profit. Trump Media lost $49 million in the first nine months of last year, when it brought in just $3.4 million in revenue and had to pay $37.7 million in interest expenses.

FILE - The Truth Social account for former President Donald Trump is seen on a mobile device, Wednesday, March 20, 2024, in New York. Trump Media & Technology Group, whose flagship product is social networking site Truth Social, will begin trading on the Nasdaq stock market on Tuesday, March 26, 2024. The common stock of Trump Media & Technology Group will trade under the ticker symbol “DJT.” (AP Photo/John Minchillo, File)

In a recent regulatory filing, the company cited the high rate of failure for new social media platforms, as well as its expectation that its operations will lose “for the foreseeable future” as risks for investors.

Research firm Similarweb estimates that Truth Social had roughly 5 million active mobile and web users in February. That’s far below TikTok’s more than 2 billion and Facebook’s 3 billion — but still higher than other “alt-tech” rivals like Parler.

However, Trump Media has said it doesn’t keep track of some numbers that rivals use as key measures of their performance, such as average revenue per user or active user accounts. It says it wants to focus on the long-term instead of “short-term decision-making.”

For that long term, though, skeptics see struggles ahead for a company that’s estimated to have far fewer users than rivals in a business where gaining a critical mass is key.

“I think there is a possibility of, sooner or later, the stock price falling by 95%,” said Jay Ritter, a professor and expert on initial public offerings of stock at the University of Florida’s Warrington College of Business.

Brian Dunn, director of the Institute for Compensation Studies at Cornell University, compared the fervor for Trump Media shares to the meme stock craze that boosted shares of companies such as GameStop and AMC Entertainment to exorbitant heights in 2021.

“Like any meme stock or fad, as long as there’s a greater fool to buy you out for what you paid for it, than you can continue to prosper,” Dunn said, warning that small investors “could end up holding the bag when the music stops.”

On Monday, Trump told reporters that “Truth Social is doing very well. It’s hot as a pistol and doing great.” On Tuesday, he posted “I LOVE TRUTH SOCIAL, I LOVE THE TRUTH!,” on the platform.

The company, which is based in Florida, said in a recent regulatory filing that it “is highly dependent on the popularity and presence of President Trump.” Trump Media has acknowledged that there are risks associated with Trump’s outsized influence.

If the former president were to limit or discontinue his relationship with the company for any reason, including due to his campaign to regain the presidency, the company “would be significantly disadvantaged,” it said in a filing ahead of the merger with Digital World.

Acknowledging Trump’s involvement in numerous legal proceedings , the company noted that “an adverse outcome in one or more” of the cases could negatively affect Trump Media and Truth Social.

Another risk, the company said, was that as a controlling stockholder, Trump would be entitled to vote his shares in his own interest, which may not always be in the interests of all the shareholders generally.

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NIGHTMARE SUPPLY CHAIN ATTACK SCENARIO —

What we know about the xz utils backdoor that almost infected the world, malicious updates made to a ubiquitous tool were a few weeks away from going mainstream..

Dan Goodin - Apr 1, 2024 6:55 am UTC

What we know about the xz Utils backdoor that almost infected the world

On Friday, a lone Microsoft developer rocked the world when he revealed a backdoor had been intentionally planted in xz Utils, an open source data compression utility available on almost all installations of Linux and other Unix-like operating systems. The person or people behind this project likely spent years on it. They were likely very close to seeing the backdoor update merged into Debian and Red Hat, the two biggest distributions of Linux, when an eagle-eyed software developer spotted something fishy.

Further Reading

Researchers have spent the weekend gathering clues. Here's what we know so far.

What is xz Utils?

xz Utils is nearly ubiquitous in Linux. It provides lossless data compression on virtually all Unix-like operating systems, including Linux. xz Utils provides critical functions for compressing and decompressing data during all kinds of operations. xz Utils also supports the legacy .lzma format, making this component even more crucial.

What happened?

Andres Freund, a developer and engineer working on Microsoft’s PostgreSQL offerings, was recently troubleshooting performance problems a Debian system was experiencing with SSH, the most widely used protocol for remotely logging in to devices over the Internet. Specifically, SSH logins were consuming too many CPU cycles and were generating errors with valgrind , a utility for monitoring computer memory.

Through sheer luck and Freund’s careful eye, he eventually discovered the problems were the result of updates that had been made to xz Utils. On Friday, Freund took to the Open Source Security List to disclose the updates were the result of someone intentionally planting a backdoor in the compression software.

It's hard to overstate the complexity of the social engineering and the inner workings of the backdoor. Thomas Roccia, a researcher at Microsoft, published a graphic on Mastodon that helps visualize the sprawling extent of the nearly successful endeavor to spread a backdoor with a reach that would have dwarfed the SolarWinds event from 2020.

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What does the backdoor do?

Malicious code added to xz Utils versions 5.6.0 and 5.6.1 modified the way the software functions. The backdoor manipulated sshd, the executable file used to make remote SSH connections. Anyone in possession of a predetermined encryption key could stash any code of their choice in an SSH login certificate, upload it, and execute it on the backdoored device. No one has actually seen code uploaded, so it's not known what code the attacker planned to run. In theory, the code could allow for just about anything, including stealing encryption keys or installing malware.

Wait, how can a compression utility manipulate a process as security sensitive as SSH?

Any library can tamper with the inner workings of any executable it is linked against. Often, the developer of the executable will establish a link to a library that's needed for it to work properly. OpenSSH, the most popular sshd implementation, doesn’t link the liblzma library, but Debian and many other Linux distributions add a patch to link sshd to systemd , a program that loads a variety of services during the system bootup. Systemd, in turn, links to liblzma, and this allows xz Utils to exert control over sshd.

How did this backdoor come to be?

It would appear that this backdoor was years in the making. In 2021, someone with the username JiaT75 made their first known commit to an open source project. In retrospect, the change to the libarchive project is suspicious, because it replaced the safe_fprint funcion with a variant that has long been recognized as less secure. No one noticed at the time.

The following year, JiaT75 submitted a patch over the xz Utils mailing list, and, almost immediately, a never-before-seen participant named Jigar Kumar joined the discussion and argued that Lasse Collin, the longtime maintainer of xz Utils, hadn’t been updating the software often or fast enough. Kumar, with the support of Dennis Ens and several other people who had never had a presence on the list, pressured Collin to bring on an additional developer to maintain the project.

In January 2023, JiaT75 made their first commit to xz Utils. In the months following, JiaT75, who used the name Jia Tan, became increasingly involved in xz Utils affairs. For instance, Tan replaced Collins' contact information with their own on oss-fuzz, a project that scans open source software for vulnerabilities that can be exploited. Tan also requested that oss-fuzz disable the ifunc function during testing, a change that prevented it from detecting the malicious changes Tan would soon make to xz Utils.

In February of this year, Tan issued commits for versions 5.6.0 and 5.6.1 of xz Utils. The updates implemented the backdoor. In the following weeks, Tan or others appealed to developers of Ubuntu, Red Hat, and Debian to merge the updates into their OSes. Eventually, one of the two updates made its way into the following releases, according to security firm Tenable:

There’s more about Tan and the timeline here .

reader comments

Promoted comments.

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It should be noted that the attack only works because Debian and Redhat added functionality to sshd that is not present in it as distributed by its developers. The extra functionality adds systemd interaction, which requires libsystemd which requires liblzma, a component of the (compromised) xz package. One should be wary of distributions adding functionality. Often it increases the attack surface, not only because of the modifications/additions themselves, but also by adding dependencies.
So a prime reason this became potentially exploitable is libsystemd in OpenSSH. Need I say more.
The prime reason is a very well funded and capable attacker looked for a way in. if not xz or systemd then they would have attacked via the next candidate weak point.

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"This developer persona has touched dozens of other pieces of open-source software in the past few years.". Well, I guess the Opensource community have some codes to review. Maybe the xz incident is only the tips of the iceberg.

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IMAGES

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  2. Technology Timeline #1; Introduction

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  4. Educational Technology Timeline 1997-2023

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  6. Unit 2 Populism Timeline Assignment

COMMENTS

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    2.) The Chain Link Timeline. Provide each student with a strip of paper for each event (or construction paper, if you wish), and have students write about the event on the strip. If desired, you can have students illustrate the event, too. Then, have students link each chain event together to create a timeline chain. 3.)

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  23. research!rsc: Timeline of the xz open source attack

    Timeline of the xz open source attack. Posted on Monday, April 1, 2024. Updated Wednesday, April 3, 2024. Over a period of over two years, an attacker using the name "Jia Tan" worked as a diligent, effective contributor to the xz compression library, eventually being granted commit access and maintainership. Using that access, they ...

  24. Microsoft, OpenAI plan $100 billion data-center project, media report

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  25. NETL To Lead Multi-National Lab Collaboration To Rapidly Advance

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  26. Trump's Truth Social gains in its first day of trading on Nasdaq

    Updated 1:15 PM PDT, March 26, 2024. NEW YORK (AP) — Shares of Donald Trump's social media company rose about 16% in the first day of trading on the Nasdaq, boosting the value of Trump's large stake in the company as well as the smaller holdings of fans who purchased shares as a show of support for the former president.

  27. Baker Hughes to supply liquefaction technology for Cedar LNG project

    April 5 (Reuters) - Oilfield services firm Baker Hughes (BKR.O) said on Friday it will supply electric-driven liquefaction technologies to Cedar LNG in Canada. The company has been benefiting from ...

  28. What we know about the xz Utils backdoor that almost infected the world

    Malicious updates made to a ubiquitous tool were a few weeks away from going mainstream. On Friday, a lone Microsoft developer rocked the world when he revealed a backdoor had been intentionally ...

  29. Key analyst says latest Apple move would be a 'horror show'

    Wall Street reacts. Wedbush analyst Dan Ives told CNBC Thursday that, if the project comes to fruition, it would serve as nothing but a distraction from the key area that Ives thinks Apple ought ...

  30. Biden administration approves eighth US offshore wind project

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