<p>Is there a long way from 620 to over 700 on MATH SAT1? I got 620 in October and I will retake the test in December. I am an international student and I don't think I had enough time to prepare. I used the Blue Book (but didn't finish it before the test) and the PR. I would like to know what is the best studying strategy to use in one month and what book should I use during this month to obtain the best results? I can borrow a Gruber's complete SAT guide from 2009. Should I use that? Any other strategies?</p>