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本研究では，高等学校物理「電気と磁気」単元の電気抵抗に関する概念形成を促すことが期待できる導電性粘土の電気抵抗教材としての可能性について検証を行った。材料特性の分析より，導電性粘土は形状や食塩配合率を変化させることで，様々な抵抗値や抵抗率の電気抵抗を簡単に製作することができ，さらに直列，並列接続することで，合成抵抗の実験にも応用可能な教材であることが分かった。また，実験群と統制群による電気抵抗の抵抗率，形状と抵抗値の関係を求める実践を通して，導電性粘土は電気抵抗の形状と抵抗値に関する科学的概念の形成を促す他，形状を用いた合成抵抗の概念理解や，電気分野に関する興味・関心の深化，基礎的な計算問題の理解度の向上に有効であることを確認することができた。, In this study, we examined the potential of conductive clay as a teaching material for electrical resistance, which can be expected to promote the concept formation of electrical resistance in the high school physics "Electricity and Magnetism" unit. From the analysis of the material properties, it was found that by changing the shape and salt content of the conductive clay, it was possible to easily create electrical resistances with various resistance values and resistivities. Furthermore, by connecting in series and parallel, it was found to be a teaching material that can also be applied to experiments on combined resistance. In addition, through the practice of obtaining the resistivity, shape, and resistance values of electrical resistance by the experimental group and the control group, we were able to confirm that conductive clay is effective in promoting the formation of scientific concepts concerning the shape and resistance of electrical resistance, forming the concept of synthetic resistance using shapes, deepening interest and improving the level of understanding of basic calculation problems in the electrical field.

愛知教育大学大学院教育学研究科