How to unblock Facebook at school?

I tried to unblock facebook at school, but does not work … and when i use proxy, but still Block … Please let me know.

This free proxy unlock major websites such as Facebook, Twitter, etc are restricted to certain sites, but it is a clean proxy not spam you or give you malware. IP address changes every day to make it harder to block. To use type the IP address and port 80 in browser proxy settings. Today's address is 184.72.175.146 You can get the daily management at these sites: http://www.wildtunnel.com http://www.countersurf.com http://www.ippredator.com to unblock web filters that detect proxy serious attempt to pay for the VPN service. http://www.surfbouncer.com/stealth_ssl_vpn.htm

how to unblock facebook at school