Keep in mind that most students take calculus in their senior year. More advanced ones take it in junior year. If a student finishes calculus in middle school, it is quite unusual. He or she can still do AP calculus BC, AP statistics in high school. Some most elite HS provides multivariable calculus, number theory and/or linear algebra as well. If the HS does not provide those, enroll in a junior college or university may be the way to go.
Admittedly, having one subject so advanced creates some problems. But these are lovely problems to have.
