Can a TEFL certificate be used to teach subjects other than English?

Yes. A TEFL certificate prepares teachers to adapt their teaching across different subjects and although it doesn't qualify candidates to teach subjects like math or science, it can offer teachers in other fields valuable insights into how to teach students whose first language isn't English.

Foreign students who want to attend English-speaking colleges and universities will often prepare by studying other subjects through English. This sort of English is referred to as “academic English” and means that teachers who are equipped with TEFL skills and the ability to teach a subject outside of English are in demand.