<p>How important are SAT subject tests if they are not required by the schools you're applying to?</p>
<p>Not very, look at the schools common data set and see if they even consider them other than for placement</p>
<p>High scores certainly can’t hurt you.</p>
<p>If you take any AP classes, taking an SAT subject test in the subsequent field is often a very good idea. I’m taking AP Biology, AP English Lang (I’ve been in honors English all of high school as well), and AP US History thus I’m taking the Biology, Literature, and US History subject tests.</p>