One advantage to waiting until Junior year to take all of the subject tests is that your child will have had much more practice taking standardized tests by then. My daughter took the biology subject test as a freshman, and then waited to take further subject tests until the end of junior year (She took US History, Math2 and Chem). My son is a current sophomore and is not taking any subject tests this year either. He took Biology in 9th grade and will probably take Math 2 and either Chemistry or Physics next year. The advantage to our school is that kids in AP classes don’t have finals, so they can use the extra time after the AP exams to prep for the June SATs. @billcsho, my daughter got a 5 on the AP US history test, but only a 690 on the SAT, so there may not be that much correlation between the 2 exams.