Hello prasad,

Here is how you can be a school teacher

• You first of all need to acquire a graduation degree in mathematics which is Bsc honours (mathematics)
• After completing it, you should apply for B.ed in mathematics
• Once you complete it you will easily get a job in any private school
• To get a job in a govt. School you need to clear an exam called TET which can be given only after B.ed.

Process of becoming a university professor

• Bsc(mathematics)
• MSc(mathematics)
• Net
• Phd
• You can skip net and directly get admission in PhD by giving the entrance of any specific university.
• You will be recruited as an assistant professor.
• After a good experience you will become a full time professor in the university.

I hope it helps you.

There is also an interesting article about the same topic which I suggest you to read https://www.google.com/amp/s/school.careers360.com/articles/career-as-school-teacher/amp