Practice Test/Book Question; also need tips?

<p>Okay so I'm studying for my ACT in October and I have two books- Princeton Review Cracking the ACT (2013) and Barron's 6 ACT Practice Tests. I found that the Barron's one is a lot harder. Will it still help me to continue these practice tests and just reviewing the answers?</p>

<p>Here are my scores from my practice tests</p>

<p>E: 30
M: 30
R: 29
S: 26</p>

<p>I just end up making stupid mistakes for english and math, and I have no idea why I'm so bad at science. I'm aiming for a composite score of 32+</p>