統合的・発展的に考察する力を育成する算数科授業の開発 : 第１学年「ながさ・かさ」第２学年「長さ」における異学年交流を通して

This study aims to clarify the ideal lesson method to foster the ability of integrated and developmental thinking by focusing on exchange in combined classes. Three aspects must be considered to make the most of the interaction scene. The first is to structure a unit so that contents that handle the same viewpoint and way of thinking can be set simultaneously. The second is to structure the class so that an exchange time between different grades can be created within one unit time. This was practiced in a unit that deals with the same measurement area. The evaluation was conducted by observing the consideration in an integrated and developmental manner based on the utterance record and the descriptions of the reflection of the children. The results were as follows. By considering the unit structure, setting an exchange time between different grades, and using common teaching materials, it is possible to foster the ability of integrated and developmental thinking.