|The purpose of this study looked revisit the ``project OO`` from Kilpatrick’s ‘The project method’ concept point of view that teachers use a variety of means in elementary school. In this study, we found that some of the issues revealed in the elementary school classroom projects and give the term phenomenon, but slightly different meaning: that "project OO ``. The results first, Kilpatrick thought the school should be the purposeful activities of the students and propose ``The Project Method``. Second, the school has expressed the claim that we should focus on the psychological aspects equally logical aspects of curriculum. Third, the school must provide an experience that can have a ``mind-set`` that the student continues to lead activities(learning). This proposal, based on Kilpatrick said that four issues revealed in the "project teaching" phenomenon of Elementary school. First, we can not use to teach Kilpatrick’s ‘The Project Method’ in Korea. Second, purposeful activities shall be determined only students. Third, project teaching is a personal task and the problem based learning. Fourth, the "Psychological" had been misunderstood as a method, rather than considered to be an aspect of curriculum.