From pedagogy (back to) educational sciences - from psychopedagogy to didactics– from Piaget to Vygotski: A Genevan case study in educational research and scholarship from 1950 to 2000 Geneva 1948: The Institut des sciences de l’éducation is transformed into Institut interfacultaire des sciences de l’éducation with two departments: psychology, headed by Piaget, Pedagogy by Dottrens. Psychology strongly develops and dominates, psychopedagogy is conceived of as application of Piaget’s genetic psychology. On the other side, pedagogy and experimental pedagogy, more modestly are linked to teacher education and to school administration (Hofstetter, 2009). After 1948, three important and significant phases of development can be observed that will be illustrated by an analysis of the development of institutions of the actors involved and of the courses and seminars proposed (sources: minutes, regulations and rules, curricula, bio- and bibliographies of actors) 1. End of fifties- beginning of sixties. First differentiation of the field by the creation of institutions of educational research outside university, founded by school administration involved in important school reforms. Sociology, experimental pedagogy, history of education enter the field. 2. Beginning seventies: the Institute becomes a Faculty. The pedagogical section becomes the section of educational sciencesS. In the context of the ongoing school reform and more generally of radical critic of education, educational sciences are strongly developed: new domains (evaluation, school reform, adult education, special pedagogy, ), new disciplines (anthropology, philosophy, economy of education, sociology, history) and psychopedagy in a non piagetian sense (language, science and mathematics education) 3. The nineties. Teacher education is integrated into university: strong development of didactics (social sciences, foreign languages, arts), with a paradigmatical shift to Vygotski ; new research domains are developed (intercultural education; family and school; professionalization and education). The communication will illustrate this general framework by some particularly significant facts and events.