Abstract
On this study, a new teaching method was developed for the concept formation of automatism on computer for junior high school students. This teaching method includes two productive processes in which use a metal-turning lathe, the one process is controlled by a teacher's hand operation and the other process is controlled by the computer program. On this teaching method, the teacher requests students to present the differences between two processes after observation. The teaching practices including the proposed teaching method were performed to junior high school students. And the tests were given to investigate concept 'automatism' of junior high school students before and after the class. In those tests, questions are on mechanism of machine other than the metal-turning lathe controlled by computer. The effectiveness of the teaching method was verified by the comparison of these results. As the results, concept 'automatism' of junior high school students progressed after the class, and results of learning was confirmed. Therefore, the new developed teaching method confirmed effectiveness for the concept formation of automatism on computer control for junior high school students.