The purpose of this lesson is for students to solve problems involving volume. Students multiply and divide multi-digit whole numbers using the algorithms learned in the previous sections.

In this lesson, students estimate the volume of the world's largest toy wagon, based on an image. In order to make reasoned estimates for the length, width, and height of the wagon, students will need to:

• Choose an appropriate unit of measure so that the estimates are whole numbers of the right size to visualize.
• Use the people in the wagon as the one point of reference to make an accurate estimate of the length, width, and height of the wagon.

When students choose an appropriate unit of measure and use the image to reason about the length, width, and height of the wagon, they are applying abstract mathematical reasoning to make conclusions about a real-world object that they most likely have not actually seen (MP4).

For actual images of the wagon, search “World’s Largest Toy Wagon 2019.”

As students worked in their small groups today, whose ideas were heard, valued, and accepted? How can you adjust the group structure tomorrow to ensure each student’s ideas are part of the collective learning?