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本研究では,協働的知識構築モデルにおける授業デザインの教授方略を見出すことを目的とした。対話的な学びの教授方略として,Gillies(2014)が指摘した対話的会話(Dialogic Talk),根拠に基づく説明的会話(Accountable Talk),探求的会話(Exploratory Talk),対話的教授(Dialogic Teaching)を小学校理科授業に援用し,協働的知識構築モデル(Stahl, 2000)におけるフェーズ移行との関連ついて検証した。実践した授業は小学校第3学年「光の性質」の単元である。協働的知識構築モデルのフェーズの成立及び移行に対話的な学びの教授方略が取られており,協働的知識構築のために対話的な学びの教授方略が有効であることが明らかになった。
In this research, we aimed to develop a lesson design with teaching strategies that incorporate a model of collaborative knowledge building in an elementary school science class. As a teaching strategy of collaborative interactions, Gillies (2014) pointed out teachers' dialogic skills, which are comprised of Dialogic Talk, Accountable Talk, Exploratory Talk, and Dialogic Teaching. We verified the relationship between teachers' dialogic skills and the phase shift in the collaborative knowledge building model (Stahl, 2000). The lesson we practiced was a unit of elementary school grade 3 science called "Properties of Light". A teaching strategy of interactive learning was taken up in the phase formation and transition of the collaborative knowledge building model, and from the results it became clear that the interactive learning teaching strategy was effective for collaborative knowledge building.