Help raising score?

<p>I am sure this has been posted many times, but for whatever reason, I can't seem to get my score above a 28. another problem is ever since i started taking the ACT (april 2014), I can never seem to get my math above a 26. On December's Test, i had a 28C, with subcors 29E 26M 33R 25S. Science fluctuates, even though I don't know why. In September, the 2nd time i took it, I got a 28C 27E, 26M, 30R, 29S.I have been using the Real ACT prep boko, the red one, and barron's 36. Any help would be appreciated, since I have to take it again in march due to school requirements. ;/ By the way, I am currently a junior.</p>