In Google Docs and Google Sites there is an option to see the revision history.

Use this to…

  • See who has been working on the document.
  • Revert back to an old revision if you are unhappy with the changes.
  • Revert back to an old version if a collaborator makes changes that were not welcome.
  • Grade group work, as the instructor you can go into revision history to see each student in the groups contribution.