Google® for Education
Tech-Teacher's Google Apps Learning Site
Google Mail Help
Help from Google (web)
Migrating from Outlook (very helpful even if not currently using Outlook)
Google Calendar Help
Help from Google (web)
Google Documents Help
Help from Google (web)
Google for Teachers
Google Education Home (web)
Google Lit Trips (not sponsored by Google)
Google Earth Across the Curriculum (large pdf)
Google for Educators Discussion Group
Google Docs for Teachers - Ideas (web)
Other Google Tools