That is good advice regarding timing issues for all the different tests in high school! In DS' case, it would be a question of taking it in 8th grade versus 9th grade. One reason I was considering waiting another year is so that he could take two or three subject tests on the same day rather than just one. By 9th grade, he would be qualified to take one or two other subject tests besides Math II. I wasn't so much thinking that he would learn helpful concepts in Calculus but that he may mature mathematically and improve as far as timing and accuracy.
