Noise-cancelling headphones. Noise-cancelling headphones are headphones that reduce unwanted ambient sounds using active noise control. This is distinct from passive headphones which, if they reduce ambient sounds at all, use techniques such as soundproofing.
English to Speakers of Other Languages (ESOL): The term ESOL is generally used when describing programs outside of a PK-12 setting that are designed for ELLs who seek proficiency in social and academic language; ESOL programs, which may also be referred to as English as a Second Language programs, generally teach basic grammar, vocabulary and ...
ESL is just the first abbreviated term associated with students who are learning English. Here are a few more terms that you may find when working with an ESL program. ELL (English Language Learners) - Refers to students who are not yet proficient in English but are in the process of developing their skills. This is a commonly used term in K-12 education.