The practical researchs of teaching-learning process in physical education had begun about 25 years ago, and developed the many imformation. In this research area, there were two main trends, one is the analysis method by categoly system, and the other is the theoretical approach. And modern didactics in general by Dr. Yoshimoto had been contributed to physical education lessons for espesially elementaly school teacters. But the teachers of high school can't apply the Dr. Yoshimoto's theory to their class room manegment. We think the reason why high school students are not liner reactions to teacher's actions compare with elementary students. And physical education class has much more difficult than other subjects do classroom lessons like as mathematics and so on.
Therefore we will be clear the difficalties of physical education class, and must construct the physical education didactics as a total theory by the new sysmistic discusstions.