http://www.stopcyberbullying.org/
Skip intro. Click on your age group and read about different topics.
https://www.callersmart.com/articles/49/What-Is-Cyberbullying-and-How-to-Stop-It
http://www.cyberbullying.us/index.php
Click on research on the right hand side to get some statistics.
http://www.ncpc.org/cyberbullying
Scroll down to the headings.
Utah's Online Library
http://www.pewinternet.org/Presentations/2011/Apr/From-Texting-to-Twitter.aspx
Cyberbullying Report from 2007