Timelines your class builds together

What you can do

• Teach from a public timeline. Share its link, or put it on your course page with Share → Embed on a website. Students read it without signing in.
• Build a class timeline together. Add students under Sharing & settings → Collaborators as Contributors. Their edits arrive as pull requests, each showing what it adds, removes and changes, with a discussion. You Merge or Reject each one.
• Show where each fact comes from. Add the Sources and Dating context plugins, and a moment lists its sources and says how precise its date is: a day, or an estimate.
• Make it look like a lesson. The History education suite adds icons, background pictures for periods, rich text notes and headings in one step.
• Work at any scale. Show times as dates, years or millions of years, or in seconds down to fractions. Times are exact, so the formation of the Earth and a single second fit on the same line.
• See what happened at the same time. Compare timelines on one shared axis, or separate a timeline's moments by tags, such as war and trade, into tracks of their own.

What you can count on

• Free and open source. OpenChronology is free software under the GNU GPL version 3, with no payments or paid features.
• No account needed to read. Anyone can read public timelines, and anyone can start a timeline in the browser and export it as a file.
• Accounts are for people 13 and older. Sign-up asks for a year of birth, and refuses anyone younger. Younger students can still read public timelines.
• Private until you share. A timeline saved to the server starts private: only you and the collaborators you add can open it.
• Every save is kept. Each save to the server is a revision, listed under History, that you can open and export.
• Your school can run its own server. Server packages for Windows, macOS, Debian, Ubuntu, Rocky Linux and RHEL, Fedora and FreeBSD, or Docker Compose on any system, keep your classes' timelines on your own machines. See administration.