You can pursue MEd or PG certificate in Education in countries like US and UK. The eligibility for these courses is BEd or any bachelors degree with 2yrs experience as teacher or if you have an equivalent bachelors degree with good academics and prove you can research in the subject. To read about BEd in India, refer https://allegiance-educare.in/blog/how-to-become-government-teacherlecturer-in-india