There is a growing body of evidence suggesting that secondary mathematics teachers may not be drawing significant benefit from the tertiary mathematics courses they take in preparation programs or in-service for professional development. While there are some theory-driven attempts to re-design or complement such courses for teachers, empirical…

In this paper we investigate task design in an unusual professional development course for elementary school teachers, conceived and taught by research mathematicians. Prior analysis singled out "relevance for teaching" as a critical design issue for engaging teachers in effective learning. The aim of the current research is to uncover…

Teachers and mathematicians hold different perspectives on the teaching and learning of whole number arithmetic. Though these perspectives may be complementary, sharing them across communities is challenging. An unusual professional development course for primary school teachers, initiated and taught by research mathematicians, provided a setting…

Is it possible that a meeting of mathematicians and primary school teachers will be productive? This question became intriguing when one professor of mathematics initiated a professional development course for practicing primary school teachers, which he taught alongside a group of mathematics Ph.D. students. This report scrutinizes the uncommon…