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 access Facebook at school - Week 40, September 2009

We post a new list of unblocker sites about every week, so sign up for our feed to stay updated!

The easiest way to unblock Facebook at school is to use an unblocking website. You can access any site that is blocked by using this method.

How do unblockers work?

An unblocker is like a gateway that sit between the computer you're on and the site you want to go to. The unblocker goes to the site instead of you, accesses the page, and forwards it to you. So the site you want to be on never sees your IP. So, basically you are visiting sites in an indirect way. School filters think you are just accessing the unblocker, not the real site.

Here are some unblockers you can use to unblock Facebook:
rabbitproxy.info
youtubevideos.name
smartfriend.co.cc
www.haveall.info
www.jot13.info