Teaching & Education

B.Sc mathematics has a good scope in future. If you are good with mathematics, then you will able to teach mathematics. Now a days, mathematics is used in software developing and computer science and technology and its applications.

No, I don't think that coaching is must to crack the exam.
You can follow the below mentioned steps:
1. You just need to use best study material.
2. Solve previous year question papers as many as you can.
3. Stay updated with all the latest news, changes in the pattern and syllabus.
4. Give at least 6 -

There is only one institute that I am aware of HL Institute of Commerce (HLIC), Navrangpura, Ahmedabad. You can search out the details and maybe more that offer the same.

To become a lecturer, one has to apply, appear and crack NET exam after post-graduation degree with required eligibility.
NET: National Eligibility Test conducted by UGC twice every year. One in June and another in December every year for the selection of lectureship and award to JRF (Junior Research

The various job types after completing M.Phil in English-
University or College Lecturer
Content Writer or Editor
Journalism
Translator
Copyeditor
Copywriter
Author
Account Executive
Account Supervisor
Assistance Editor/Production Editor
Broadcast Advertisement Manager
Columnist
Communication Skills Trainer

60% is needed but there are a lot of institutes with no percentage criteria.

Go for post-graduation in mathematics if you want to be a maths teacher after your B.Ed so as to became eligible for PGT mathematics.

You are advised to do graduation degree and B.Ed. through distance learning to advance your career as primary teacher.