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<p>A calculus course in community college or university is typically four to six hours of class time per week. A typical high school course (calculus or otherwise) is four to five hours of class time per week. Of course, your community college and high school can have different scheduling.</p>
<p>The high school that I attended taught AP Calculus BC (then the only calculus course offered) in one school year in slightly more than four hours of class time per week to students who had finished precalculus the year before. Now, they do the same, although they also offer the option of doing AB instead of BC.</p>
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<p>No. You may want to ask universities you are considering whether community college or AP credit is better accepted at each university. If none which you are considering accepts AP but not community college credit, then there is no need to take the AP Calculus test if you do well in community college calculus courses. At least in state universities, community college credit is often better accepted than AP credit, especially in subjects other than math.</p>