As a mathematics professor, you teach college students at a university or junior college. Your responsibilities can include instructing students in a review of high school math. Duties may also include teaching applied mathematics or general math to students pursuing non-math-related careers. You develop lesson plans, create presentations, teach classes of students, assign and grade classwork and homework, and administer tests and exams. You may teach the same course repeatedly, instruct in different levels of mathematics each quarter or semester, or teach multiple mathematics classes concurrently. Once you achieve tenure in your professor role, you also supervise graduate students in the field.