How accurate are Kaplan's tests for the Chemistry SAT II's?

<p>I took the Kaplan Diagnostic test recently, and I got a 640 on it. How accurate is that and which prep books have the most accurate tests for the Chemistry SAT II's?</p>

<p>Kaplan usually makes good prep books for Social Science SAT IIs and APs, but not on science and mathematics. Kaplan SAT Chem practice tests are often easier than actual test, so do not trust the score.</p>

<p>If you can, get Barron’s (read that book for two or three times accurately, and I guarantee that you will score 750 plus).</p>

<p>Okay, thank you for your help.</p>

<p>Kaplan’s AP Calculus tests were awful. Too many mistakes.</p>