<p>What should I buy in order to improve my 630 M score to at least a 700+? Basically, which prep book would be better to improve my score?</p>
<p>ive heard PWN the SAT Math guide is good, i havent used it yet myself but i plan too. If you go on amazon.com you’ll see the reviews there 
But i too would like to know what else would be great. I used Grubers and my math score didnt change AT ALL which really upset me. Maybe i just used it the wrong way idont know but i pretty much got all the answers in the practice reviews so ithought i was good but apperantly not.</p>