抄録
In this paper, the authors have investigated the pedagogical content knowledge (PCK), which is included as one of knowledge bases for teaching offered by and based on Lee Shulman. Firstly, we analyzed the nature of PCK based on essential literature. Secondly, we investigated the facts concerning lower secondary science teachers in Japan by qualitative and quantitative surveys. We have identified that PCK is a complex knowledge based on six teachers' knowledge, and that experienced science teachers' PCK may differ considerably from novice science teachers. We think that the conceptualization of PCK can be a powerful tool for understanding science teaching and may be useful in and pre-service science teacher education.
