In this paper, we reported how graduate students changed their concepts on classroom management between before and after taking a lecture “Practical Methodology of Classroom Management”, which was one of lectures for students of the Special Teacher Training Course, Graduate School of Education(Professional Degree Course), Naruto University of Education. The course is for students who just graduated to develop their teaching competency. Eight students were participated in the lecture. The lecture was held on the first semester of the graduate school, which had 1 orientation and 7 lessons. In the first and second lessons, students filled in pre−questionnaire which asked students about their ideal classroom management and the ways to embody th...