What is an ESL Program? English as a Second Language (ESL), also called English as a Foreign Language (EFL), is an English language study prograrn for nonnative speakers. Most ESL programs have brief classes so that students can concentrate individual attention from their teachers. The goal of an ESL program is to improve the students English level. ESL classes teach different language skills, depending on students. English capabilities, interests, and needs. All programs teach the following:Conversational English, Grammar, Reading, Listening, Writing Comprehension and vocabulary.