Posters/handouts to help teach your students and patrons how to use Google more effectively: posters, bookmarks, starter guides.. etc for many of the google tools
If downloading and keeping student work is an issue then let's connect Mahara so that our students have an electronic portfolio of all their work. Google Apps for Education is fairly new and has recently added Google Groups to the mix. Maybe with a little push Google would add even more to the list. To say that its disadvantages outweigh its advantages is simply overstated.