PRISMS works with individual students and will give credit for college courses taken either in person or online. However, the PRISMS math curriculum goes beyond the typical high school curriculum, and includes multivariable calculus, discrete mathematics, polyhedral geometry, linear algebra, and more. btw, there are sophomores who will complete calculus this year, and they will not be in danger of running out of course material. There is also an active math team which placed second in its first competition (Division B PUMAC) this year. The team is coached by one of the math teachers who has coached the Chinese IMO team. Also, fyi, Princeton University allows area students who have topped out of math (or any subject, for that matter) at their schools and who have scored a 5 on the AP to take courses at Princeton. However, I expect scheduling would be difficult.