Foreign curriculum in Indonesia schools become more in demand. The schools facilitate the teachers with the students’ book written in English. The teachers must be able to deliver the lesson into the correct English that is specifically made and used in the classroom. Not all the teachers know that English for teaching is different from daily English. Since SD Tunas Global combined the new curriculum from the Cambridge in the education year 2020-2021 with the goverment curriculum, the needs of using English inside and outside the classroom is a must. Phenomena which were often appeared from the observation were teachers often used mother-tongue language; Bahasa Indonesia and they tend to directly translate Bahasa Indonesia into English without knowing whether the language was proper English to use in teaching. Techer talk is the sentences and expressions that can be used both inside and outside classroom. The data were taken from the interview, observation and the result from the test. This research employed qualitative and quantative method.