Good Morning,
You may have noticed Google has added a new option in your Google Documents menu bar call Add-ons. You may find some useful apps to use within your documents. Track Changes allows you to track the changes a student makes in his/her document. This is a great tool for the editing and revising phase of the writing process!
Some other add-ons you may like are Charts, Easy Bib, Thesaurus, VexTab Music Notation or TextHelp's highlighting feature. Once you download the add-on, there is a Learn More button with a helpful video. If you have a student with a particular need, we can discuss adding an add-on to his or her drive.
Please let me know if I can help in any way. Have an awesome day!
Mary