How do practicing mathematics teachers continue to develop the knowledge and habits of mind that enable them to teach well and to improve their teaching over time? The question of how (and what) teachers learn lies at the crux of any effort to provide high-quality mathematics teaching for all students. This article reviews 106 articles written…

We report on how two middle-grade teachers supported their students' mathematical reasoning within the context of a novel modeling task in data analysis. We examine how the task features supported the development of teachers' knowledge as their students engaged with the task. Analyses of the teachers' practices suggest that the task features…

The challenges facing those who seek to prepare mathematics teachers are well established in the literature. Most of the research to date has focused on the perceptions and understandings of pre-service teachers, but not on the perceptions and understandings of teacher educators. In this study, we explore how four teacher educators understand…

Investigates how multimedia case studies of practice can support pre-service teachers in making meaning of complex classroom experiences and in developing strategies and rationales for using student thinking to guide instruction. Finds that the pre-service teachers were able to use their perspectives on a common practice to highlight some of the…

Analyzes the interrelations between prospective and practicing teachers' learning of the mathematics of change and the development of their emerging understanding of effective mathematics teaching. Develops novel computer-based activities to challenge participants' mathematical understandings and requires them to use technology during short…