Personal Learning Network Sites(sites where you can share ideas with and learn from othe educators)
Classroom 2.0 Live!
Watch, listen, and/or participate in some fantastic webinars that give you new ideas for teaching
Share fantastic educational websites with others and see video demos on how to use great educational sites...all free
Learn Central
Attend free webinars conducted by teachers just like yourself or conduct your own webinar through Elluminate
Participate in FREE webinars that demonstrate some really cool websites and web 2.0 tools that you CAN use in your classroom. A premium version is available for access to more webinars, but it is not free.

Social Networking Sites for Schools
Collaborize Classroom
Extend classroom discussion to a structured and online community
An educational social networking site for classrooms; only students registered to an Edmodo class can see the posts for that class; parents can sign up to see only the posts from the teacher and the posts of their child
Create and manage student and teacher blogs including videos and podcasts. Edublogs boasts it's "safe, easy and secure."
A free online toolkit that makes it easy to work with and coorinate groups; share and manage files, a group calander, poll your group, post links, set up conference calls, chat online, send out mass text messages, and send voice or email messages to the entire group; great for classrooms

Free Websites for Your Class
Google Sites
Make a professional looking website through Google
School Notes
Create notes for homework and class information and post them on the web in seconds using this free service
Weebly for Education
Create a free class website