ESL = English as a Second Language
The main focus of this program is to teach students the English language. Classes may include students of different languages, all receiving intensive assistance learning English. ESL is usually taught during a specific school period, and students are involved in other mainstream, immersion or bilingual classes during the day.
LEP = Limited English Proficient
This term is used to describe language-minority students who are not proficient in English.
ELL = English Language Learner
This term is often used in lieu of Limited English Proficient (LEP) as a way of emphasizing the abilities of language-minority students, rather than emphasizing their limitations.
TESOL = Teachers of English to Speakers of Other Languages
TESOL is an advocacy organization that underwrites programs and projects that address issues affecting the teaching of ELL students.