Draftback is a Chrome Extension that allows you to play back a Google Doc as if you were recording a video of all of the edits. This simple Chrome Extension will allow a writer, or someone who is helping to give feedback to a writer, to view their writing process and see the flow of their writing. This could provide information into how they wrote something and help find ways for that writer to improve.
Another use, which some teachers will like, is that it can show you quickly if there were any major copy and pasting going on in the document. If you think someone was guilty of plagiarism, you could easily view their document and see if the flow of writing matched what it should look like or if there was a giant chunk of writing that just appeared at once.
You can find the Chrome Extension at http://ift.tt/1QcSgCe or watch the video below to see how it works.