<p>My D, at an elite engineering U, did as sacchi suggests, taking calc2 as a first-semester college freshman after having done well in AP CalcBC. She does not consider it wasted time. At least 1/3 of the material in her calc2 class was new to her. Even the topics that she had seen before were presented with more depth and harder problem sets. She feels it was valuable prep for her subsequent classes.</p>