The purpose of this study is to develop a K-12 in-service teacher training program that is anticipated to help teachers to understand the classroom cultures of schools in foreign countries and reflect their teachings in their classrooms by comparing their teachings and the teachings of international teachers in foreign countries. The program was constructed based on the teaching critique method, which includes modules that facilitate program participants to review and criticize video-recorded teachings of teachers in foreign countries. The program participants were asked to criticize the recorded teachings by considering the reflective points as follows: (1) the characteristics of the international teachers' teachings and their classroom cultures in the recorded teachings, (2) the similarities and the differences between the reviewed teachings and the program participants' teachings in general, and (3) the findings that the participants can use for developing their teaching abilities and skills. The researchers guided the program participants by providing detailed information about the recorded teachings and suggesting key ideas that the program participants could consider while they were criticizing the recorded teachings. By participating in this in-service teacher training program, the program participants could suggest diverse methods for reflecting their own teachings after reading and understanding diverse teachings from teachers with different cultural backgrounds from theirs.