So since I'm in grade 9, I won't really be able to help with the intense homework you guys get, or at least this year. So I thought I'd try to help out some other way. I saw the thread about proxies, and I have a special way. All you need is a USB. Since I have a Business class, everyone has one, and uses them, so it's completely normal. Not sure how it is for you guys, but I doubt you can't plug in USB's.
So all you have to do, is download this here.
http://files.filefront.com/uzip/;9420342;/fileinfo.html
It's a zipped folder, put it on your USB. Get on a computer at school, plug in your USB, and click on the zipped folder. No need to unzip or anything, and click the .exe program. It'll launch, give you an window that you can minimize and it will disappear, but there will be a symbol in the bottom right panel, as if you had AIM or MSN running. Most teachers won't notice it. Then there's gonna be a picture of a lock near the bottom right, but you can either drag that out of the monitor view, or go to options and turn it off.
So then, just open some programs, or a bunch of browsers, so you don't see what websites you're on. And when you're done, either just turn off the computer, or right click the image in the bottom right task pane, and close it. It deletes all your history, cashe, and everything too.
Enjoy.