Help!

<p>okay, so...I'm a sophomore and I'm taking math 3 this semester, which is pretty much the equivalent of pre-calc. next semester I'm supposed to take ap calc ab, but I don't know how I'm going to do it in only one semester. I'm thinking of trying to self-study some of the concepts.</p>

<p>does anyone have any advice, or know any good websites that can help me?
also- what is a good prep book? I've heard PR is good, but is it the best?</p>