This report describes the first year of an ongoing intervention study and the learning of a group of practicing teachers working together with researchers to make changes in the ways they teach mathematics. When reflecting on their beginning efforts, the researchers found that several assumptions in their planned interventions were not borne out…

This report describes the first year of an ongoing intervention study and the learning of a group of teachers who are working together to make changes in the ways they teach mathematics. The document presents a vision of mathematics education based on research in cognitive psychology which indicates that learners construct knowledge rather than…