<p>When I first started studying for the SAT, I used Peterson’s for free. The prep didn’t really help at all. The questions were very inaccurate.</p>
<p>I wouldn’t recommend taking courses or using any other practice material from companies other than the College Board. If you’re going to spend money, spend money on the Official SAT Online Course from the College Board (it has several practice tests online made by the same people that make the SAT) and the Official SAT Study Guide (a book; edition 2 is the latest). You can buy these directly from the College Board website.</p>