Sources

At the foot of a lesson, Sources lists what the creator drew on for it, numbered, with each title a link. Not every lesson has them. A lesson that relies on facts or on other people's work should, as section 6 of Academic Integrity asks.

Rules and limits

• A lesson lists up to 25 sources.
• Links open in a new tab. Unless you trust the site, a notice asks first: Continue, Cancel, or Always trust that site. Ctrl-click or Cmd-click goes straight there. See Staying safe.
• If a source link is broken, tell the creator with a correction and choose Broken link: see Correcting a lesson.