The workbook "Using a Bar Model: Multiplication and Division" continues practice with using bar models as a visual tool to represent and solve multiplication and division problems. Students learn how to draw and interpret bar models to represent multiplication scenarios, such as using repeated addition and arrays, and how these models can be partitioned to show division as both sharing and grouping.

Bar models are visual representations that help third-grade students develop a concrete understanding of multiplication and division by illustrating the relationship between quantities. Using bar models, students can see how multiplication can represent groups of equal size and how division involves splitting into equal parts, making these operations less abstract.