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<p>Most high school students (even those going to college) do not take calculus at all in high school.</p>
<p>When I went to high school, students who completed precalculus before senior year took calculus BC. There was not the idea of forcing the best students in math to take calculus at a slower pace (AB one year, rest of BC the next year) than average college students would take it.</p>
<p>Taking calculus (AB or BC) as a high school junior is two years ahead of normal, usually an indication of a top student in math.</p>