Nisawa, Yoshiki2024-11-222024-11-222024http://hdl.handle.net/2003/4294410.17877/DE290R-24777Student learning leads to deep learning when students are allowed to take the initiative in their own learning. However, it has been pointed out that Japanese middle-school students face issues of learning motivation, potentially hindering them from taking the initiative in learning, which requires that teachers improve their teaching. To solve this problem, we introduced a portfolio consisting of 4 items on a single sheet of paper. The results show that is effective for teachers to improve their teaching according to their students’ actual situation.enGesellschaft für Didaktik der MathematikBeiträge zum Mathematikunterricht 57Sekundarstufe IDiagnose und Förderung510ConferencePaper