what??? your school blocks ns? jesus i am so glad mine doesn't, i don't know what i'd do if i couldn't get on ns during school hours. probably become a snowboarder or something *shivers*
you know you can run a proxy-like thing by going through google, opening up google in another language, getting google to translate a page back into english, and then run your websites through the translation window. Its just like a proxy, and you still can use flash based websites.
Ive been doing it all year for all the blocked sites at my school, mostly just with things like facebook, i never had to try it with newschoolers. With facebook once i logged in it just went back to english, but kept the translate stuff. finding a working proxy isnt that hard though. Try a secure proxy that uses https:// (https://www.vtunnel.com was one i used) instead of http://, they didnt seemed to be blocked wherever i tried