Here is an interesting article about what kind of information the proxy servers you may be accessing can do with information about you.
Here are some discussion questions for you to think about:
Do you think it is ok for kids to use proxy servers at school?
Why do you think kids use proxy servers at school?
Is using a proxy server like breaking and entering?
Should a student be punished for using a proxy server?
Do you think using a proxy server violates school rules compared to any other school rules?
Do you think schools should unblock all content or just some content?