The Conceptual Models for Integer Addition and Subtraction (CMIAS) were initially developed from the stories that students posed for integer addition and subtraction open number sentences. Three grade 5 students participated in a 12-week teaching experiment where they solved open number sentences for integer addition and subtraction open number sentences in four Individual Sessions. The students’ responses (verbal and drawings) as they solved these open number sentences were analyzed. This data supported the refinement of the CMIAS. The refinement of the CMIAS, which includes the changes that were made to initial descriptors and the data that supported these refinements, will be highlighted.
Session Type: Brief Research Report