Everyone's always ordering you around while in school. Your parents tell you to attend, the teachers tell you what to write, what to eat, what to wear, who to hang out with... the list goes on. You'd think you're in a correctional facility or something like that. You would guess that after forcing you to go to and all that stuff, they'd at the very least be decent enough let you browse whatever web sites you would like as long as you're stuck there. Apparently not. The interwebs are censored, and lots websites are blocked. Fortunately, there are a couple of ways to bypass the restrictions, and it's a good deal more easy than getting your parents to homeschool you.
An unblocker is a kind of gateway that sit between the computer you're on and the site you're visiting. The unblocker accesses the site you want in your place, downloads the page, and sends it off to you. So the site you want to access never sees your IP. So in effect you are surfing websites indirectly. Internet filters only think you are accessing the unblocker, not the destination site.
An alternative way to unblock Facebook at school is by setting up your own unblocker tool. This is harder than just using an unblocker but it pays off because you're in control. How to do this is beyond the scope of this article, do a search for "How to make your own proxy" you should find instructions. You can also make money from this through advertising.
Other ways to unblock Facebook include to use sites that translate pages, such as Google Translate or Babelfish. Also try using Google's cache version of the site. However, you probably won't be able to to log in using these methods, so it's still better to use unblockers for Facebook, though these tips are good with most websites.