Ideas of Web 2.0 in the Classroom

http://langwitches.org/blog/2007/12/22/best-web-20-applications-for-elementary-school/
http://larryferlazzo.edublogs.org/2007/12/21/the-best-web-20-applications-for-education-2007/
http://larryferlazzo.edublogs.org/2009/01/30/votes-are-in-for-2008s-best-web-20-applications-for-education/
http://www.kn.pacbell.com/wired/fil/pages/listweb20s.html (hotlist of Web 2.0 sites)
http://wiki.monroe.edu/index.php/Free_Tools_for_Teachers (free tools for teachers)