• ESOL (sometimes known as ESL) – English to Speakers of Other Languages. An instructional service provided to English Language Learners by certified teachers which supports the development of full social and academic proficiency in English. A variety of models can be used, such as pull-out, push-in, and team teaching, but in all cases the ESOL professional collaborates with other educators to support language development in, with, and appropriate to English language arts and the content areas.