Why don't you pick something that shows what a stupid, subjective, idea "Good" and "Evil" are, and how idiotic your teacher is for posing it:
Good: The Internet
Evil: The Internet
Think about it... is the Internet the medium by which we get our information and enlightenment, or is it just a tool for pornographers and cyber-stalkers?
You could recount your own experiences of learning things vs. the first time you masturbated by a monitor. That would show that self-righteous biatch!
To Paraphrase: "Good, Evil, it doesn't matter... I got the gun!"