Honestly, I think this really varies. Our school only offers calc BC, and it is covered in one year. I think this may be in part because after common core changes, a lot of what ls covered in pre-calc is actually calculus and so kids "begin" the calculus year having covered a lot of the early material in the previous year.
However, I also had the understanding that the material in calc AB is all covered in calc BC and thus redundant.

Last edited by cricket3; 07/12/16 09:56 PM.