The focus of this study was on the development of mathematics teachers via teacher off-the-job-training at an attached junior high school. In this paper, we analyzed the comments of mathematics teachers participating in teacher off-the-job-training.The followings outcomes were identified:
a) Demonstration classes were conducted in a unique way, where participants observed two classes in which the the same unit was taught but in different ways. This was beneficial to participants.
b) Participants in the demonstration class were able to carefully observe the behavior of the instructor.
c) This method enabled participants to fully discuss the strengths of the teaching materials.