Dear Student,
Glad to hear that you have special interest in teaching which a great job. To your information if you want to be a teacher of maths subject you first need to do your graduation with a course having an integrated proportion or fully based on like B.A or B.S.C. in maths or B.tech are most probably preferred and then you have to take your education in teaching by doing B.Ed which you can do only after your graduation and after completing your graduation from maths and B.Ed after it you can start your profession as teacher. Hope this might help you, Best of luck.