"ESL, or English as a Second Language, is a field of study designed to serve the needs of school-aged or adult learners of English. That is, ESL classes teach English in countries in which English is the majority language to new immigrants, or to their immigrant or native-born children."
Hansen-Thomas, H. (2014). English as a second language (ESL). In S. Thompson (Ed.), Encyclopedia of diversity and social justice. Lanham, MD: Rowman & Littlefield Publishers. Retrieved from http://proxy.devry.edu/login?url=http://search.credoreference.com/content/entry/rowmandasj/english_as_a_second_language_esl/0?institutionId=2985
English a a Second Language, ESL, grammar, vocabulary, idioms, English as a Foreign Language, EFL