In order to improve a student's individual skill and volition, teachers have to understand the personality of each student further, and find the time for students to face each other, cooperating with an organization outside of the school. However, it is difficult to conduct time-consuming experiments and trainings in a public junior high school due to extra costs, extra works other than a regular lesson and teaching, and so on, though almost teachers have high volition and consciousness for the education in a school. The aim of this study is the validation about the effectiveness and problems of the utilization of robots as a teaching material for science classes in a public junior high school collaborated with the university. As a result, the utilization of robots as a teaching material with the cooperation between a junior high school and a university was very effective not only in order to achieve the purpose of a science lesson, but also in order to evoke the interest to engineering and science. We gave and obtained the precious impression in 50 minutes class work, as shown in the comments in the questionnaire survey. Therefore we attached a subtitle ``The treasures of the 50 minutes''.