SAT Subject Tests--Study Materials & Submitting Scores

<p>Okay, so I need some major advice. I’m taking SAT subject tests on October 5th, and I’m applying ED to WUSTL. So, here are my questions:

  1. Where can I find free study material for the Lit, Math II, and Chem tests?
  2. If I’m in these corresponding AP classes, can studying for the AP Exams help me study for the Subject Tests?
  3. Can submitting these scores hurt my application?
  4. Can submitting these scores help my application?
    I’ve already done some studying, but I really need to hit the books hard this upcoming month. Any help would be great.</p>