Find a proxy that you can get onto at school.
Also, at my school the program that they school used to block site way a proxy based service. So If you remove the proxy from the computer you effectively disable to blocking for ever.
But, I can not recommend that you do any of this as you will get hot water. And, if you do the second one you could have to pay a IT guy to "fix the problem".
Edit:
I just remebored that if you use google you can view the cash part of the site, not so use full as it is only text but some times it better then nothing. And you can use google translate to translate a site from english to english, this create a sort of proxy, and you will be able to view the site(images and everything) as long as the school does not block google.