Noun
TEFL (uncountable)
(education) Initialism of teaching (of) English as a foreign language
Coordinate terms: EAL, EFL, EIL, ELL, ESL, TESL, TESOL
She also has completed a TEFL course, which gives her an opportunity to teach English as a foreign language, should she ever decide to travel in the future. Source: Internet
You’ll need to have a degree and experience as well as a TEFL qualification. Source: Internet