Abstract
In this study, the authors tried to develop the structural model of the factors for the sustainable development of school-based practical researches(SBPRes).Firstly, to clarify the factors for sustainable development of the SBPRes in schools, the authors made interviews with leading teachers to get information on their efforts to revitalize SBPRes extending for more than one year at three elementary schools and one junior high school. The authors analyzed the data using the ideas on the sustainable PLCs. Based on the findings, the authors made the tentative structual model for the sustainable development of the SBPRes. Secondly, to confirm the reliability of the model, the authors made interviews with leading teachers about SBPR efforts extending for a few years at another 3 elementary schools. The authors analyzed the data using the ideas on sustainable PLCs again and confirmed the reliability of the model. In addition, the authors clarified the existence of another factor for the SBPRes development and redesigned the model in consideration with the order and relationship among factors
