UW-Madison usually has students who “passed” the AP calculus exam start with the first semester calc course as they are not prepared for the second semester course- much more is covered in the UW version than the AP one. AP is comparable to a mediocre college class and not to top U versions. btw- regular calculus at UW is problem based while the Honors version not only covers an extra course in its sequence but is theory based. “Calculus” courses vary greatly at the college level.