## Goal

Students will calculate the volume of soil in their garden.

### Estimated Time

45 Minutes### Setting Required

Outside## Standards

- CCSS.M.5.MD.C.3. Student will recognize volume as an attribute of solid figures and understand concepts of volume measurement.
- CCSS.M.5.MD.C.4. Students will measure volumes by counting unit cubes, using cubic cm, cubic in, cubic ft, and improvised units.
- CCSS.M.5.MD.C.5. Students will relate volume to the operations of multiplication and addition and solve real world and mathematical problems involving volume.

## Materials

- Tape measures (1 per small group)
- Set of about 50 unifix cubes (1 per small group)

## Procedures

- Optional: Complete the Square Foot Garden collection to review area and perimeter.
- Challenge students in small groups to determine the volume of a raised bed (how many cubic square feet can fit into the raised bed) in order to determine how much soil would be needed to fit it. Provide students with a tape measure and with unifix cubes.
- Guide students in calculating the volume by calculating the surface area (in square feet) then multiplying it by the depth of the bed to find the cubic feet.
- Model for students how to create a model of the bed using unifix cubes with the scale being 1 inch (the side of a unifix cube) equaling 1 foot (on the raised bed). In this way, students can double check their calculations of the volume of the raised bed.
- Challenge students to determine the total volume all of the raised beds using the concept that volume is additive.