I'm currently banned from talking about conservatism at school until I agree that constant use of the word 'moron' isn't necessary in political debate.
One of the key things to remember is to be above their language and MO. Kill them with facts, without resorting to the temptation of stooping to their level. You'll be amazed at how influential you can be.
So you're not allowed to talk about the lefties, huh?!
Welcome to Free Republic. All the friends you could ever hope to have are right here!
But there are so very many more colourful words you can use! And your teacher probably won't have the nerve to reprimand you for using such words... when they have to look them up first ;o)