<p>My son - a high school junior - has to enroll for his fall courses by midnight tonight. We thought that we'd talked it all out and made the tough decisions - via consensus, of course. But then we got hit with a curve at the end. He has to choose between Calculus 1 and Calculus BC. Both are listed as AP. None of us know what Calculus 1 refers to. A quick search of google and this website suggests that there is no info out there. </p>
<p>We think it might be some idiosyncratic language used by his school.</p>
<p>Or perhaps not, and someone here can tell us what the difference between the courses most likely is.</p>