The University of Michigan's center for teaching has a great set of resources for using Google Apps in the classroom. Their site is at
http://www.crlt.umich.edu/oct. You can search for presentation by App (Docs, Plus, Blogger) and view presentations on how faculty used the app(s) in teaching their course.
A great starter is Jeff Ringenberg's presentation on how to use Apps to make teaching his 600+ student Engineering 101 course easier.
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Andre Schmidt
Project Manager, Emerging Technologies
Office of Technology Services
Illinois Institute of Technology