English language learning and teaching

ESL (English as a second language), ESOL (English for speakers of other languages) and EFL (English as a foreign language) all refer to the use or study of English by speakers of other languages. The precise usage, including the different use of the terms ESL and ESOL in different countries, is described below. These terms are most commonly used in relation to teaching and learning English, but they may also be used in relation to demographic information.

ELT (English language teaching) is a widely-used teacher-centred term, as in the English language teaching divisions of large publishing houses, ELT training, etc. The abbreviations TESL (teaching English as a second language), TESOL (teaching English for speakers of other languages) and TEFL (teaching English as a foreign language) are all also used.

Other terms used in this field include EAL (English as an additional language), ESD (English as a second dialect), EIL (English as an international language), ELF (English as a lingua franca), ESP (English for special purposes, or English for specific purposes), EAP (English for academic purposes), and ELL (English language learner). A somewhat similar term, LEP (limited English proficiency), is also used in this field
Terminology and types
The many acronyms used in the field of English teaching and learning may be confusing. English is a language with great reach and influence; it is taught all over the world under many different circumstances. In English-speaking countries, English language teaching has essentially evolved in two broad directions: instruction for people who intend to stay in the country and those who don't. These divisions have grown firmer as the instructors of these two "industries" have used different terminology, followed distinct training qualifications, formed separate professional associations, and so on. Crucially, these two arms have very different funding structures, public in the former and private in the latter, and to some extent this influences the way schools are established and classes are held. Matters are further complicated by the fact that the United States and the United Kingdom, both major engines of the language, describe these categories in different terms: as many eloquent users of the language have observed, "England and America are two countries divided by a common language." (Attributed to Winston Churchill, George Bernard Shaw, and Oscar Wilde.) The following technical definitions may therefore have their currency contested.