<p>I really am not 'for' national companies. I don't believe they help you as much as good old-fashioned studying.</p>
<p>What strikes me as the major problem on your scores, given the range you want to aim for, are your science, and particularly reading.</p>
<p>Science and reading are the most related topics on the test. They require quick reading and inferring. The best way to practice this is several-fold.</p>
<p>A) Read often. Challenge yourself with scientific articles and prose. I'm not talking 'Harry Potter' prose, I'm talking classics. Getting used to reading difficult works will make both sections much easier.</p>
<p>B) Practice often. Practice, practice, practice is the age old secret to success. Don't limit yourself to any one resource.</p>
<p>C) Review your right AND wrong answers. Understand both fully. A common mistake is to only look over what questions you got wrong on practice test, and say 'Okay, well, that was dumb, I won't do that again'. Then you do. You have to fully understand EVERY question. This is the only way to ensure you won't make that error again.</p>
<p>First off, it's good to have lofty goals, but you have to be realistic about Princeton...</p>
<p>I think what you need to do is work on some practice science and reading tests and learn what combination of reading the passages/graphs and reading the questions works best for you.</p>
<p>Don't worry! Especially on the science and reading. The first time I took the ACT, I received a 23 on science and reading. When I studied some and became more comfortable with the test I received a 30 on reading and 33 on science. Like the Poster said above, Practice Practice Practice.</p>