All academic institutes that offer language courses should have a program that adheres to international standards. They must also provide you with the necessary material and information to be able to help your students reach their goal. Whether you are teaching English in the USA, UK, Australia, China, Mexico or Colombia, the school should provide you with a program that will be easy to follow.
Publishers produce different books for EFL or ESL contexts. Visit the major publishers such as Longman, Cambridge, Oxford and Macmillan or their local representatives and see how the books are formatted for both purposes. Some schools in EFL countries such as Mexico, Greece, China and Peru call their English program ESL. They do this as a marketing strategy and try to make parents feel that their kids are learning English the same way kids do in English speaking countries.
Other common acronyms used to refer to teaching English are:
As you can see there are similarities and differences in EFL and ESL. Take these things into consideration when teaching students and preparing your lessons.