The joke that is CELTA.
The course doesn't give you the skills needed to develop a lesson plan and teach English without a textbook. The course teaches how to use a textbook and understand how to organize lesson plans for different parts of the textbook (Productive Skills: speaking, writing, and Receptive Skills: reading, listening)
CELTA is a gimmick driven teaching method using cheesy classroom exercises and games to 'engage' the students. Small children might respond well to this parlor trick teaching style, but the 14+ year old student's eyes glaze over as they watch CELTA trainees perform for the tutors that grade the trainee by an arbitrary lesson plan format in the corner of the room. The guinea pig students that CELTA uses to practice teaching on are never asked or polled by questionnaire and assessment for the sake of integrating their experience into the grading process of the CELTA enrollees. The CELTA course has no interest and no regard for how much these 'guinea pig' students have garnered from the teaching method. CELTA and its tutors assume they know best no matter what the students being taught English by the CELTA method experience.
CELTA promotes a European notion of English having many different pronunciations and this results in poor quality control of graduates that represent the CELTA brand, as a lot of inconsistency in word meaning and pronunciation makes its way into the world classroom. There are non-native speaking CELTA graduates that graduate not being able to pronounce crucial phonemes in the English language. Some of the assessors also, who have a cushy job only coming two days out of the course and flying to all kinds of novel places in the world to "quality check" that the tutors grading the course are using the arbitrary lesson plan system to CELTA standards, can't even pronounce English words in an intelligible way. CELTA assumes that this is eclectic, inclusive and an accurate representation of English in the world. And yet it amounts to inconsistent teaching, without standards, that the students being taught English suffer as a result of.
CELTA is a brand, plain and simple, backed by the 'Cambridge prestige'. It is the epitome of non-innovative British arrogance and any other TEFL course will provide you with equal teaching knowledge at less cost and less monotony of arbitrary and redundant exclusively-lesson-plan driven criteria.
