This study was conducted to determine whether a successful in-service teacher training program using IT networks could be realized while minimizing costs, with a view towards practical application of such a program. For minimizing costs, we tried to develop a program by recording lectures by attached school teachers. These teachers usually went to nearby public schools to provide lectures on teaching methods. We tried to record the lecture as it is using a video-camera, and editing of the video simply using a nonlinear editing software. Consequently the costs of time, human resource, and workload for development of a program were minimized. The theme of this program was assessment of integrated study. To evaluate the usefulness of the program, it was introduced into the program of a public elementary school. Via a questionnaire, thirtyeight teachers were asked to evaluate the program in terms of appropriateness of its content, videos and texts, and its effectiveness on future training. An analysis of their responses reveals that most of the teachers found the training program to be highly fruitful. This study demonstrates that a successful in-service training program can be achieved while keeping costs to a minimum.