Formative Assessment
Formative Assessment icon

Do students understand that volume is the amount of 3-dimensional space sand (or gravel or water) takes up inside a vial?

Observe students’ estimation strategies to find evidence that they understand volume is a 3–dimensional measurement.

Keep these questions in mind as you interpret students' estimation strategies:

Students often confuse volume in 3 dimensions with height, area or perimeter. In the following video, identify the strategy and decide if it is viable or not.

As a next step, ask students to show and explain the strategy they used.