The video below is a basic introduction to Google Apps for Education. It explains the difference between a regular Google account and a Google Apps account. Hopefully this will help clarify some common misunderstandings and emphasize the additional benefits of integrating Google Apps for Education into your school.
If you are interesting in "Going Google" you might find this post on Google Apps Training Resources helpful. You can also browse through the certified trainer directory where you will find great people to help you setup your domain and train your staff on how to effectively use Google Apps in a school setting.