Students will learn how to find the volume of a right rectangular prism by counting unit cubes. Each cube may be associated with a measure. For example, cubic in, cubic ft, etc. Any unit of length known at this time is fair game. Here's a lesson. Students can practice here, and here.

Watch these Khan Academy videos:

Do these Khan Academy exercises:

Next, give your students these challenges:

- 2020 Math Kangaroo Levels 3-4 Problem #21 by STEM4all
- Tug of War by NRICH
- 2017 Math Kangaroo Levels 5-6 Problem #24 by STEM4all

Conclude by leading this investigation:

Spectral Blaster (symmetry, mini mathematical universe)

by MathPickle

5.MD.C.3: Recognize volume as an attribute of solid figures and understand concepts of volume measurement.

5.MD.C.4: Measure volumes by counting unit cubes, using cubic cm, cubic in, cubic ft, and improvised units.