How accurate are the SAT Biology, US History, and Eng Lit tests in the official books

<p>How much are these tests in the official book like recent tests? Are they same difficulty, similar curves ect.?</p>

<p>i would also like to know this..</p>

<p>i just took the november subject tests for bio and us. </p>

<p>for what its worth, on the official practice test for us, i got a 720. on the real test, i got a 680. on the practice test for bio, i got a 720. 670 on the real test.</p>

<p>i took the sparknotes tests and i got a 690 for us and a 640 for biology.</p>

<p>that was bio M by the way.</p>