Abstract
Mathematical reasoning features in curriculum documents around the world, but is
understood and enacted poorly by teachers in classrooms. We explore teachers’ noticing of
reasoning during observed lessons. Two teams of primary teachers in Canada and Australia
worked to plan, deliver, and observe lessons intended to include reasoning. They observed
each other teaching a lesson that was planned with the assistance of a researcher, and later,
a researcher observed each post-lesson discussion. Given the reported benefits of teachers’
noticing of reasoning during peer-observed lessons, targeted professional learning support
is required to further enact teachers’ peer discourse to facilitate mathematical reasoning.
Sandra Herbert & Leicha A. Bragg
Peer Observation As Professional Learning About Mathematical Reasoning