SAT Changing- Buy or don't buy prep materials?

<p>I'm a sophomore this fall, and I'm taking the PSAT. I'm also taking it my junior year, hoping to get NMF. I'm going to buy prep books soon to start studying for only three tests that I'm going to take: PSAT for sophomore, PSAT for junior, and then SAT to confirm my PSAT score. I hear the SAT is changing, so should I buy prep books anyways? Or when will it actually start to affect people who already have studied?</p>

<p>The SAT isn’t changing. at least until 2014</p>