算数文章題解決における「まとめて考える」考えの指導に関する研究 : 「考える足場」をつくる授業設計による授業実践

抄録

This study examined an effective teaching method to teach an idea of "unifying" to second graders when solving word problems in elementary school mathematics. In the experimental class, lessons were based on the scaffolding method. There were three differences between the experimental and control classes. First, the teaching of an operator that focused on change was included in the teaching plan of the experimental class. Second, students in the experimental class were asked to solve the two ideas of "unifying" and "ordering" in solving word problems, while students in the control class were asked to use the idea of "unifying". Finally, a third type of operator (decrease & decrease) was taught only to the experimental class. The results of a post-test showed that students in the experimental class used the idea of "unifying" more frequently in solving word problems and they solved challenging problems more easily than students in the control class.