I wouldn't do such a destructive thing. Attack your School webpage instead, search for XSS,SQL Injection and that sort of things.
There are lots of very good hackers (most of them are ethical) at http://sla.ckers.org. CReate an account in the forum and PM some users asking...
See the folloeing sites, they are good. http://sla.ckers.org http://ha.ckers.org http://fr3dc3rv.blogpsot.com http://www.0x000000.com...
I visit the following hacking sites almost daily. They are very good and focus into Security of WebSites and Wireless. http://ha.ckers.org...
Separate names with a comma.