Research in the field of math education continues to press teachers guide instruction based on students' needs and contributions, focusing on student learning through facilitation of whole-group discussions. This dissertation presents the findings of a qualitative study of two elementary teachers managing such "ambitious" teaching practices across…

Our research is concerned with teacher's knowledge, and especially with teacher's processes of learning, in the classroom, from observing and interacting with students' work. In the first part of the paper, we outline the theoretical framework of our study and distinguish it from some other perspectives. We argue for the importance of…