Abstract
This study investigated the factors stimulating in-house lesson study and revealed how they influence the development of the teaching competence of young, mid-career, and veteran teachers. To accomplish this aim, a questionnaire survey was conducted with all junior high schools in A city in Shizuoka Prefecture. Responses were obtained from 295 teachers, and a quantitative analysis was performed. Consequently, the five factors of "collegiality," "study content and method," "organizational framework and climate," "social trend," and "goal setting and sharing" were extracted as factors stimulating in-house lesson study. Additionally, analyzing how the factors stimulating in-house lesson study influenced the development of the teaching competence of young, mid-career, and veteran teachers revealed that "study content and method" influenced teachers in all the career experience segments, and that the number of stimulating factors increased as teachers became more experienced and headed toward becoming veteran teachers.
