This article focuses on teacher professional development (TPD) in natural science through the 5E model as mediating artifact. The study was conducted in an upper secondary school, grounded in a school-based intervention research project. My contribution to the field of research on TPD is founded on the hypothesis that teachers would be best…

This article focuses on the theoretical frame of action research and the teacher as researcher, working through a Norwegian Research Council-funded project in a school that explored learning strategies for pupils' subject and social development. Action research is here called research and development (R&D) work as the term envisages that…