Skip to main content


Standard 2: Reason Abstractly & Quantitatively

Clip 5/13: Standard 2: Reason Abstractly & Quantitatively Using Fractions Part 2B


Mathematically proficient students make sense of quantities and their relationships in problem situations…considering the units involved; attending to the meaning of quantities, not just how to compute them; and knowing and flexibly using different properties of operations and objects.

After her 4th- and 5th-grade students’ initial sorting process, Erika Isomura reminds them that they’ve been working with bar model representations. She asks them to make sure the pictures match the stories.

See this video in the context of an entire lesson.

Materials & Artifacts