Advice for all REALLY LOW SAT Students!

<p>I can't seem to be able to improve in Critical Reading and Writing. I took the SAT in Nov. and April. I got CR:520 M:590 W:400 in Nov. and CR:530 M: 690 W:500 in April. I have also done my SAT 2 and score 730 Spanish, 710 Math 2, 640 Chem. Does anyone have advice on which programs or books are good that improve SAT Reasoning scores? I believe my application is really strong and the only thing hurting my chances of getting into Top Tier schools are my scores. So if anyone has a similar situation that has improved a lot besides studying and practice(which I plan to do) that would be nice. Thanks!</p>