During the past 3 years, the authors have developed the distance learning system that can transmit 4 videos simultaneously. In this paper, we evaluate the system by applying it to graduate-level courses for adults that contained an on-site component as well as the distance-learning component. The system is designed to permit question-and-answer interactions and discussion by a small number of remote participants, allow remote viewing of on-site lectures, and promote a sense of unity among remote participants with their on-site classmates. After each course was finished, the participants were given questionnaires containing a 5-level evaluation of the system and a few free response sections. After analyzing the questionnaires, we found no significant difference in the average values between the on-site class and the remote class except for one item, and that relatively high points were marked even in the remote classes. By using this distance learning system for graduate-level courses for adults requiring frequent interaction, it becomes clear that in remote classes, we can provide almost the same learning environment as on-site classes.
