<p>Just do a walk in at a test center on test day. Get there early. They usually have a few no shows or extra tests.</p>
<p>Thanks for the advice, I'll try and call a couple of test centers on Monday. Maybe they can still reserve me a test. Because preparing for it not knowing if I'll be able to take it could drive me crazy.</p>
<p>If it works out, I'll take the SAT II World History and French subject tests.
But which Mathematics test should I take? I or II? Whats the main difference between them?</p>
<p>And do you think my subject choice is diverse/demanding enough for Harvard?</p>