Q: The history and cookies can be deleted (although this will save you the effort), can you bypass the server without it?
A: Well, You can bypass with any internet browser. As for your suggestion of deleting cookies, usually, when you have a teacher bent on ruining your fun, they have a program called IE History, so even when you erase your history and delete your cookies, they stay logged on your computer internally, allowing admins to view it. It's just like emptying files from your recycle bin, you can choose to restore them, or dump them, when you dump them, they're still actually somewhere in your computer, you'de have to wipe your computer clean in order to get them out permanently.
Now, ON! with the instructable!
Step 1: Starting Out
!A flash drive!
A substitute that you can use, could be a CD-R or DVD-R.
What you're going to need to do is, when you're at home download google chrome, which can be found at this link: http://www.google.com/chrome
Then you're going to need to download a program called UltraSurf Which can be found here:
You will have to put the files onto your FlashDrive, then anticipate your next day of school! [Lol]
You could always try searching on google AT school, but I doubt you'll have much luck..