My parents are driving me crazy about the SATs?

I'm becoming a Sopre and my parents are just going crazy about the SATs. Every single freaken day, they have to bring up the SATs. I can't even talk about sports or anything with out my parents saying, "Thats good son, but you should focus on your studies". I'm only a Sopre! I'm taking the PSATs this year. I know I should prepare for it so I can find out where I stand and how much practice I need, but my parents are going overboard. They are making me go to SAT practice cles and buying me like 50 SAT books. I don't even know half the math that is in that book. What should I do?