Pre primary and Primary School teachers should preferably be 12th class with at least 50% marks in aggregate. For secondary and Senior secondary school teacher, one need to be a post graduate.

You can go for D.El.Ed. that is Diploma in Elementary Education. It is an elementary teachers training Diploma certificate program. The min. Eligibility is 10+2 with 50% marks.

Other trainings are- Basic training Certificate, Primary Teachers' Certificate, Diploma in Physical Education, Diploma in Primary Education, Junior Basic Training.

To become a primary teacher in govt. Schools, you have to qualify TET.

You can join any institute and start preparing for competitive exams. Otherwise, you can do certification courses from any teachers training institute.