2009 Volume 49 Issue 3 Pages 67-78
The debris flow of the gravels from the Plio-Pleistocene Kobiwako Group distributed over southern Shiga prefecture were used in the observation lesson practice in high school science classes. During the observation, students compared the gravels of the debris flow with the gravels of a river, and they discussed how the shapes of gravels were formed. I examined changes of the understanding of students by Concept Mapping and protocol in discussion. As a result, understandings about the formation process of debris flow deepened further, and revealed that this observation lesson was effective for understanding the debris flow.
