There are four Korean language classes in a middle school in the Busan area. The teacher in charge of that class is a Korean language arts teacher. Teachers struggle with teaching Korean language course instead of Korean language arts. Teachers feel difficulties when managing Korean language class. They feel that they are not understood, and feel dissatisfied with Korean language lesson but feel satisfied with their relationships with students. And because they have to go back to being a Korean language teacher, they do not want to be deeply involved in Korean language course and are afraid that their expertise in Korean language education will be weakened. Korean language classes in middle schools are gradually increasing in the future. At the school level, the task manager level, the teacher support level, and the Korean language class level, the operation plan should be improved to fit the local and school situation and to fit the level of the youth. Instead of a Korean language teacher, a teacher with expertise should be selected and assigned to the Korean language class, and if that is not the case, it is suggested that the task be separated so that only the Korean language class is conducted by a professional instructor, even if the Korean language teacher manages the class.