^ That won't always work man. I know for sure that they wouldn't work with my parents. I'm kinda in your same situation. My dad gets pretty annoyed when I don't get A's. And it's frustrating at times when I hear my friends say that they get rewards when they get decent grades (one of my friends says his parents give him $50 for each A he gets).

I got my report card a few days ago and THANKFULLY I scraped through with straight A's (with higher level classes). So far I'm at a 4.0. But then again, I only started smoking in May. I'll have to be careful not to let it affect me next year.