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 unblock Hi5 at school - Week 47, November 2009

We post a collection of unblocking sites approximately every week, so subscribe to our RSS feed to stay updated!

Some tips for using unblockers for Hi5

It's best to use an unblocker that isn't well-known. This is because popular unblockers will get discovered and blocked sooner. Unblockers that you find by searching the internet will be filtered sooner because teachers can find them so easily. Even if you find a good one it's a good idea to have a few others you can use if it gets blocked.

Here are some unblockers you can use to unblock Hi5:
yourteamgiants.info
netrover.info
letmepassnow.info
colddrink.co.cc
yowsh.info