I'll tell you this, for me, pot didn't hurt my schoolin too bad... It was mostly my attitute (which was definately influenced by my drinking back then). This year I've gone back to college, starting over at Trig in summer semmester. Right now I'm in Calculus 2 and Engineering Physics. Pot can defiantely help me when I'm working on my homework and sitting in class, but it can also hurt. Just have to analyze the current situation and attempt to figure out if pot will help you or not...

Pot will give me a massive edge if I'm having trouble focusing, as I really get into my calculus/physics (very similar work, just differently applied) when high (not all-out stoned, then you get dumb)...