<p>For physics, I used tests from Kaplan, and it was really easy, and I usually got fewer than 5 questions wrong. Which book is the best and the tests most accurate: kaplan, pr or barrons
For biology, I mostly used barrons. And the same question mentioned above.
Thanks~</p>
<p>I think Kaplan's is the most realistic when it comes to tests out of the three that you mentioned. Barron's is too hard and gives you way more detail than you actually need... I find Princeton Review tests to be nonsensical and wrong at times. Try getting the Collegeboard SATII book. It has real subject tests that were administered in the past. I find that to be the absolute best in getting a sense of what the test is really like.</p>