Use the same Internet tools that your child uses.
There are a lot of great web resources for parents to learn how to use and navigate through various social media sites, such as Facebook, MySpace, Twitter, etc.Give your kid a chance for amnesty.
If your child is having problems give him/her a chance to talk about it without fear of any kind of punishment or consequence. When you establish a relationship with your child—one that assures them that you are their ally and advocate and, within a certain range of boundaries, you’re not going to punish them—they will come and admit to you that they’ve made some bad choices that may have produced some egregiously bad behaviors from other kids. Communication with your child is key!
Go to the school
if your child is not safe or is afraid to attend to school. (Katy Allen, University of Rochester bullying-expert.) http://www.warner.rochester.edu/newsevents/story/926/