<p>I used the following books or websites for the subject books I took and I improved from like high 500 low 600s to 700s and an 800 on the math exams. I know a lot of people are asking for the best books to use, so hopefully my list helps someone. Good luck.</p>
<p>math1 &math2: barrons(usually much harder problems than real test) & collegetestprep.com
physics: princeton review
chemistry: most books were good, but the only one that had enough questions to practice was collegetestprep
us history: princeton review & Ap US history class</p>
<p>I also did all the practice tests from the official collegeboard book, and they give you a good idea of what the tests are going to be like. Now, will this be enough? I don’t know how well you perform on the practice tests—if you are getting 750-800s this should be sufficient to introduce you to the type of questions and format. However, I was in the 600s so I needed a lot of practice. Barron’s questions are difficult compared to collegeboard’s questions, and I think that helped me because I was prepared for any question on the real test. If you are looking for a closer difficulty level to the real test then collegetestprep will be your best choice, and it has hundreds of practice questions. So I would learn the concepts with barrons and defintely practice with collegetestprep. This may seem like overkill but it got me from 600s to an 800. Hope that helps. Good luck</p>