Description: In a culture of communal inquiry, participants will explore the actions and situations modeled by the four basic operations, beginning with an examination of the operations on whole numbers and then moving into a study of the operations in the context of fractions.

MMO is a module in the professional development series, Developing Mathematical Ideas. At the heart of each module are sets of classroom episodes (cases) illustrating student thinking as described by their teachers.  In addition to case discussions, participants will: explore mathematics in lessons led by facilitators; view and discuss video clips of students’ mathematical thinking; deepen their understanding of the content and practice standards of the Common Core; discuss teacher moves and the NCTM teaching practices; and read overviews of related research.