What math class should your student take after Algebra II? Most universities recommend that students take at least three and preferably four years of math. After Algebra II, students have completed three years, so that fourth year could be considered optional. But I would almost always recommend that a student continue with at least one more math class.
If your student is going to pursue a course in business or another degree that requires Calculus I for non-majors (aka Business Calculus) then the HSML Pre-Calculus for non-STEM majors, taught by Joy Combs, is the class for them.
If your student is going to pursue a STEM career (science/technology/engineering/math) then the HSML Pre-Calculus with Trigonometry course, taught by Brenda Barnett, is the best option.
Both HSML Pre-Calculus courses use university level textbooks and are an excellent way to encounter the material while still in a high school style setting. After completion of either course, a student could choose to re-take the same class in a university setting so as to "get their feet wet" in that setting without encountering new and difficult coursework right away or they could choose to go right into the Calculus course of their choosing, confident in the fact that they have been adequately prepared for that next course.