<p>I took the October test recently, a decade after high school. I had some chemistry classes in college but they were more organic and I had forgotten most of them. For some reason I had to take the SAT II Chem test, so I just crammed for three weeks using Barron’s, Princeton Review, and Sparknotes. I did average on practice tests, mostly between mid 600s to low 700s. I made mostly stupid mistakes as there weren’t any fundamental problems with understanding the material. I ended up with a 790 on the real thing. </p>
<p>My advice to you is first, run through the book material as fast as you can. Honestly, the stuff is basic, so you probably don’t need college textbooks for it. Just know the prep book material inside out. I think Barron’s a bit more detailed than you need to know, but all three complement each other well. Then, do all the practice tests as early as possible, and after that just review every question, so you know the format and common pitfalls, and reinforce your memory. You get around ten practice tests out of the three prep books and I think that’s plenty. So yeah, I pretty much started from zero after many years and did quite well by studying prep books for three weeks. Seriously, I think they should make people take the SAT in their twenties, because I feel like the test became easier just because I’m older.</p>