Twitter

http://www.jhische.com/twitter/

[] If you give a teacher twitter

http://theinnovativeeducator.blogspot.com/2010/06/5-real-examples-of-using-twitter-for.html

[|5 Real Examples of Using Twitter for Education]
http://www.learnitin5.com/Are-you-using-Twitter-in-the-classroom

http://www.youtube.com/watch?v=ddO9idmax0o&NR=1 Twitter in Plain English