It is their computer so they can do whatever they want but if someone higher up in the school found out about this (ex:the superintendent) then they would probably have to unblock it.
Schools block social networking websites.
I'm not exactly sure what your question is but in the US schools have the right to block any websites that they choose to block.
Yes there is but not ones the school doesn't block.
no
They block websites that would not be beneficial to their educational curriculum.
Schools block proxy websites because they do not want students to go on uneducational websites
They use website filters. The filters stop students from accessing sites that have been blocked. The filters are ran through the school's/school district's server.
Enjoin
Schools and other facilities block out websites for multiple reasons. The main reason is to keep the user focused on what they are meant to be doing, instead of playing games or chatting. Another reason is to block out sites that might be harmful or cause damage to their computers.
No, unless your school didn't block the website. Schools mostly block uneducated websites. If you are lucky, try to not get caught by a teacher, but if you take my advice don't do it. Or you'll get in trouble. People of integrity tell the truth ALL the time.
Schools can block social networking websites. They could also recommend to parents that their children don't use it. However, it's not the school's decision.
Many different websites can be blocked. Often employers will block all websites that are not pertinent to the employees job. Parents often block websites that contain pornography and violence.