The site contains how-to articles, helpful hints and tips, a discussion forum, and more. It is a great resource for people just starting out using Google's tools as well as for Google veterans. You can subscribe to updates via RSS or by email. This is a great way to get notified about new articles and information.
It is not specifically for education, but some of the articles do relate to how to use Google's applications in school. For more specific information about Google for Educators, click HERE.
Google has a lot of great tools and applications and Google Tutor is a great way to learn more about them and expand the usefulness of the applications.