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.

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.