1. Make it possible for HS students who are interested in Calculus to take the course under the instruction from a college profess on the high school campus. That way it would be set up for students to get college credit for the class and they would not need to travel to a college campus or deal with the AP exam system.
2. Make it possible for HS students who are not interested (Yet) or at all to graduate with out taking the class. Lots of student are ready for Calculus until college anyway. No need to force them on a single path IMO.