A recurrent discussion in the field of education is how to build linkages between educational research and school practice. Cross-professional collaboration between researchers and school practitioners can contribute to the interplay between practice-based research and school development. The aim of our study is to obtain a better understanding of…

This study focuses on mathematics teachers' professional development through elements of Japanese lesson study. The teachers designed a research lesson with regard to sense-making of the derivative using the integration of GeoGebra. In the second year of the four-year lesson study project, seven secondary school teachers--from different Dutch…