<p>Another thing on Math SAT-II -- the curve on Math Level II is far more generous than on Level 1. Level II tests more advanced skills, but it is easier to make a high score. A test taker can miss 7-8 questions on the Level II and still get an 800 (depends on the actual curve for the test version used, but you get my point). If your son is already taking pre-calc as a soph and is doing well, <em>definitely</em> do Level II.</p>
<p>Physics and Chemistry SAT-IIs also have fairly generous curves; Bio, the least so. If I recall, your son is taking AP Enviro this year -- if he's taking that and has taken regular Bio already, he should be well prepared for Bio E or M. One of my son's friends who took Bio M said the tests are identical, excpet for ~10 Qs that are specific to E or M.</p>