The present study reports on a study of the development of customized intensive in-service English teachers training programs (IIETTP) reflecting on the demands of elementary/secondary school English teachers. For the purpose of study, a survey was conducted with 1,033 English teachers at elementary/secondary schools across the country. The results showed by and large no significant differences by school level, albeit some slight differences were revealed such as in training times, training methods, the percentages of teaching English in English (TEE), and other things. Since the two IIETTP models are presented as basic formats, they can be modified and applied according to the contexts of schools and the demands of trainees.