Because past research often highlights the problems of mathematics education, case studies of exemplary teachers were conducted in order to emphasize positive aspects and to stimulate and improve mathematics education. Observations of two primary mathematics teachers nominated as exemplary by their peers provided some marked contrasts. One teacher subscribed to a constructivist philosophy, provided students with opportunities for active mental engagement and had an energetic monitoring style which ensured high levels of time on task. The other teacher emphasized whole‐class activities and gave students limited opportunities to learn in meaningful ways. This teacher's style, however, was undergoing changes which were facilitated by the support of the researchers.