You need an undergraduate/bachelor's degree to do these jobs in Korea (and most places) but they can be in any subject. Beyond that I imagine he'd get additional training for those subjects but if it's just teaching kids then it could be at such a basic level he wouldn't need to do much.
Hey. Are you required to be a native speaker to teach in South Korea? Is it possible to get a job as an English teacher while holding a TEFL certificate, a teacher’a diploma, and profound teaching experience?
