What does TEFL mean?

TEFL (Teaching English as a Foreign Language) course: This prepares teachers to teach English in a country where English is not the primary language. For example, John from the USA goes to China to teach English. TESL (Teaching English as a Second Language) course: This on the other hand would prepare a teacher to teach in an English speaking country to students whose first language isn’t English. For example, John from the USA stays in the USA and teaches English to students who want to learn English. TESOL (Teaching English to Speakers of Other Languages) course: This encompasses both TEFL and TESL and can mean either one or both. Basically this prepares a teacher to teach a student whose native language isn’t English. For example, our good friend John from the USA is teaching a student who didn’t learn English as their first language.

TEFL stands for "Teaching English as a Foreign Language"