Apprenticeship to a mentor who works in a, classroom that requires the ESOL endorsement., Practicum may be conducted in a variety of, classrooms, such as English as a Second Language, (ESL), bilingual, or English Language Development, (ELD). Practicum interns work with individuals as, well as small and large groups to practice, teaching students who are acquiring English as a, second language. As part of the practicum,, candidates are assigned an on- site mentor and a, university supervisor. Candidates are observed, teaching two ELD/ESL lessons and two sheltered, content lessons.