There's a good chance your school already has most web based proxies blocked. If that's the case, there isn't another way, to my knowledge.
EDIT: I'd also like to add that if you're school is one of the few that haven't caught on to proxies, DO NOT TELL ALL YOUR FRIENDS ABOUT THEM. That's what happened in my school and within a couple months all the proxies got blocked because teachers/admin found out about them. [ KlutzyKim's advice column | Ask KlutzyKim A Question ]
Attention: NOTHING on this site may be reproduced in any fashion whatsoever without explicit consent (in writing) of the owner of said material, unless otherwise stated on the page where the content originated. Search engines are free to index and cache our content. Users who post their account names or personal information in their questions have no expectation of privacy beyond that point for anything they disclose. Questions are otherwise considered anonymous to the general public.