I'm teaching a course in System and Services Administration.
The students should document all the installation, configuration and maintenance procedures. Therefor, a solution for easy creation of documents with sharing features was needed.
Google docs appear as The Solution, where they create the documents and share them with me. So I'm able to give feed back to the students in a easily way, writing and correcting in the same document. Without the need of any extra application or a solution for syncing the changes.
Work with me and my students, maybe it could work for you.