<p>My guidance counselor suggested that I take the GRE in addition to the SAT and ACT, what exactly is the GRE, what does it test, and how does it compare to the other two? thanks...</p>
<p>Your guidance counselor is ... wrong, I think. I don't know what GRE stands for exactly, but it's the graduate entrance examination. College students take it for grad school. Nothing wrong with practicing out of GRE books, but taking it now would be silly. You have enough to worry about.</p>