There is lots of great information on there on Web 2.0 and using technology in the classroom for teachers. But often if you have teachers that are just starting out or need some help figuring all this tech stuff out, it can be a daunting task as there is lots of information. Here is the book to help teachers on Web Tools. Download it, pass it out, share it with your colleagues, administrators, teammates.
http://web20classroom.blogspot.com/2010/12/super-book-of-web-tools-for-educators.html