The purpose of this study was to clarify how trainees perceived “student understanding” based learning, in teaching practices within the health and physical education department. A case study was conducted to examine the actual situation of reflection in trainees, who were selected as focus students. Addressing the quality of social relationships, the results showed the need for improved quality relationships between students and teaching materials, from the perspective of "student understanding" through t he teacher student relationship. In addition, the results showed that a teachers’ responsible behavior was perceived as "student understanding," that originated from a receptive attitude. Furthermore, from the viewpoint of self understanding, the results showed that emotional experience as readiness is a factor. The aforementioned information can help infer that, learning through “student understanding” has influenced the emotional aspects of becoming a teacher.