<p>Terrygreg, taking the math subject test this spring is a great idea. If your son has just finished precal, much of the material on the Math II test will be fresh in his mind. He might want to buy a test prep book and play around with some of the sample questions (maybe even a whole sample exam) just to get familiar with them. A few hours spent doing this during Spring Break will help him feel more comfortable with the test. (Make sure he takes Math II instead of Math I; Math II has more precal, which is good since that's the course he just completed. Besides, some colleges don't want Math I anymore because it's too similar to the SAT Math section.)</p>
<p>Your son can register for the Subject Test in the same place where he would register for the regular SAT, which is here: <a href="http://www.collegeboard.com/student/testing/sat/about.html%5B/url%5D">http://www.collegeboard.com/student/testing/sat/about.html</a> He will need your credit card. </p>
<p>If your son does well in AP U.S. History, he should definitely take the SAT U.S. History subject test in May or June of his junior year. The subject test is almost identical to the multiple choice portion of the AP test. My daughter got a 790 with no extra studying beyond what she was already doing for the AP test (on which she got a 5). Many other kids have had similar experiences. This test is a gift from the gods. Enjoy.</p>
<p>Whether your son should take any other Subject Tests, in addition to math and U.S. history, depends on where he chooses to apply for college. He might need a third test if he's planning to apply to one of the few colleges that requires or recommends three tests (Harvard, Yale, Georgetown, Johns Hopkins, and a few others). He might need a science test if he's applying to science or engineering programs. There is no environmental science test, so he would have to choose one of the others.</p>
<p>The SAT Spanish Subject Test is indeed difficult to score high on. The questions don't look particularly difficult, but the curve is not favorable.</p>