Abstract
Here we discuss that school expedition of living environment study, which is widely practiced now as a course material for the first graders, has significance in forming identities and that it is actually the second graders, who are supposed to be only supporters, are the ones that take an important role in it. We examine it on a basis of “Legitimate Peripheral Participation” by Jean Lave & Etienne Wenger. As a result, it is shown that the second graders are not only supporters, but play four roles such as the “role to coordinate activities and ensure the opportunities for the first graders to participate in as newcomers” and a “role to carry on the culture of practice as a role model for the first graders”.
