Maybe different schools are different. The division of mathematics classes in our school is equivalent to an opportunity for internal choice and mutual conversion. Including mathematics and applied mathematics (basic), mathematics and computational mathematics, statistics. Mathematics and applied mathematics (basic) are basically for postgraduate entrance examination and research. Mathematics and computational mathematics are almost related to learning computer software programming, statistics and finance. Mathematics and applied mathematics (teachers' colleges) train mathematics teachers, and of course they can also take the postgraduate entrance examination. If you want to be a university teacher, you must go to graduate school. You are more likely to walk in the base. If you choose a normal school, you can take the postgraduate entrance examination. If you want to be a primary and secondary school teacher, choose a normal school. Ps: If you make up your mind to be a math teacher, personally, I think normal schools are more suitable for you and math is more mobile.