120-hour TESOL/TEFL course

I enjoyed the course a lot. I have more than 20 years of experience in teaching English as a foreign language, English for Aacademic Purposes, TOEFL prep, English for Medical Purposes and OET prep at university level. This course has helped me brush up my teaching skills and update my professional knowledge. However, there was one thing I have found disappointing and discouraging about the course: all the observation videos were excerpts taken from one single teacher (called teacher Jay) teaching a group of kindergarten kids. Now, if this were a course of TEYP only (teaching English to young leaners), then it would have been all right. However, a 120 hour TESOL /TEFL certificate course should have had a more balanced approach when it came to presenting examples of diverse teaching enviroments including all age groups and various types of English courses. I would very much like to have seen examples of class observations where different ELT instructors teach teenagers, adults, and business professionals etc. in such a general course. Not everybody teaches or will be teaching young learners after they get their TESOL / TEFL certificate.