Kim, Eun-ju. 2002. A Study on the Functions of Teacher Talk Reflected in the Lesson Plans Prepared by English Teachers in Pre- and In-service Teacher Training Program. The Sociolinguistic Journal of Korea, 10(1). The purpose of this study is to investigate the functions of teacher talk used by English teachers for secondary level. Twenty sets of an English lesson plan written by students majoring in English education and English teachers respectively were analyzed in terms of various functions of teacher talk. The results of the study reveal that both groups used the functions such as asking for and giving information, requesting, responding and describing most frequently among others. In addition, both groups showed some qualitative differences in the use of functions. For example, the English teachers used requests and fillers more frequently and employed politeness formula more often than the student group. The student group used the functions such as responding, describing, explaining, and expressing satisfaction more frequently than the English teacher group. The two groups showed some similarities in the use of questions. Both groups tended to use display and closed questions more frequently than referential and open-ended questions.