Try this unblocker!

It's new and nobody knows about it yet:
http://tiredstudents.com/

It looks like a lot of school administrator type people have been watching our sources, and are blocking new unblockers pretty much as soon as they're released. So all the unblockers we've posted on this site are probably blocked and any new ones we post from that same source will be blocked very quickly as well. For this reason it'd be best if you try to make your own unblocker instead - you can find instructions on how to do this here: How To Make A Proxy

How you can get on sites while at school - Week 49, December 2009

We post a bunch of unblockers roughly every week, so subscribe to our RSS feed to stay updated!

Some advice when using an unblocker for sites

It's best to find an unblocking site that very few people know about. Unblockers that get used a lot will get discovered and blocked sooner. Unblockers that you find by searching Google will be blocked quickly because teachers can find them so easily. Even if you find a good one it's always wise to have a backup you can use if it gets blocked.

Here are some unblockers you can use to unblock sites:
www.unblockblocked.net
proxiessurf.co.cc
sslproxy.ca
keeprivacy.co.cc
www.huntfun.info