I feel like beating the hell out of my math teacher...

So here's a little background information about him. He's lazy and mean and can't teach for shit.
His policies: Don't ask him for help, don't ask to go to the bathroom, don't sit there and drool. Basically, just do your homework the entire period. When you're done, do more!
So on Wednesday, we had a test. No talking, right? Okay. I'm done. Finished my homework too, so what's the next assignment? I go ask the teacher.
Teacher: Go look online.
Yeah, like I'm going to whip out my HANDY-DANDY LAPTOP right then and there and CHECK IT OUT! What an ass!
Today, we got those tests back. I got a 78%. And I have no idea why. All he does is put a -1,-2, -3, and so on on the paper! He doesn't tell you what's wrong or anything. Oh yes, I can figure out what's wrong because I'm psychic and awesome. The worst part of it all was that HALF the problems he marked me wrong for, wasn't wrong. Seriously! My dad, who went to at least 10 schools and graduated from all of them, who entered college at the age of 11, did it and he couldn't see how I was wrong either!! DAMMIT! And he gave it to us right as the bell rang so we couldn't ask him what we got wrong and why. What an ass!
He can't teach for shit, seriously. I showed my dad the test, then he asked me how come I didn't know how to do some of the problems, then I showed him my notes and my dad asked me, "... What are you, in third grade??" That is not an exaggeration. It's like a freaking time machine! My notes consist of 1 or 2 problems of absolute crap!
He is such an ass, and you know what I want to do when I see an ass? I want to kick it! It's so friggin' tempting to just whip a pencil at his head. UGH!!