Abstract
Recently, The technology of a car is making progress remarkably. It needs technical knowledge and technology to maintain this complicated system. In a car mechanic educational institution, it has two targets which makes them bring high technique up during two years and passes state qualification. And the passed ratio of this state qualification will be the evaluation value at educational institution. Therefore, various educational methods have been developed originally by each car mechanic educational institution. However, an attempt which investigates size understanding ability of students and applies it to the educational program isn′t found. So, in this paper, the particularity of the car maintenance education and the investigation of size understanding ability of students are reported. As a result, it was revealed that students possessed the linear measure in mind smaller than the actual one.
