100 Ways Google Can Make You a Better Educator is a great article on the Online Education Database. The article lists different ways to use Google's applications for communication, collaboration, research, organization and more in the classroom. It is short, sweet, and to the point and gives concrete examples of how to use Google's apps to make education better. Each tip is a link to either a Google app or how-to page or to another online article that describes how to use Google in that way.
The Online Education Database has many more great resources on their page too.