What is google docs and what is its advantage?

  Google Docs' Teaching Advantages:
If teacher is owner or collaborator,
a. can give feedback in progress
 b. can track student participation
 c. can observe work in progress
  Administrative Uses:
- Great for single documents meant for a specific group of people:
   (e.g. Agendas, Handbooks, Lesson Plans)
  In-Class Uses
- Group work
- Chat within spreadsheets and presentations
- Tests or polls for instant feedback