My son gets bullied at the school and teachers do ...

My son gets bullied at the school and teachers do not do anything. When he tries to defend himself, they punish him with a Saturday detention. Okay, so let him just get beaten up then while we wait for you to think of punishing the other student. Just bare in mind, if my son does get beaten up again, I will beat the attacker myself and sue the principal. Dumb teachers need to fix up ASAP.