<p>Ap Calc BC is generally not intended to be taken in 10th grade. If a school has 5-7 students taking it in 10th grade, it’s very impressive, especially if it’s not a math &science magnet school such as Stuy, TJHS, and a few other such schools. Ditto taking AP science in 9th& 10th grade. Your examples do not provide evidence that Exeter and Andover are for slackers. To the contrary.</p>