# Volume (or KEVA³) OBJECTIVE: Students will calculate the volumes of objects constructed with KEVA planks.

MATERIALS:

• 50 planks per student or small group
• KEVA³ Template per student or group

PROCEDURE:

1. Discuss the concept of volume being the amount of space inside an object (e.g., how much sand would fill it up?)

2. “Today we will be measuring with a unit of measurement that is uniform but not the standard, such as a pint or liter. We will be using a KEVA length as our unit. A cube that is 1 KEVA length on each side would be 1 cubic KEVA.”

3. Have the students construct a cube out of KEVA planks having a volume of 1 KEVA³. Note that 5 KEVA stacked on edge = 1 KEVA length and that 3 KEVA thicknesses = 1 KEVA width. Consequently, the cube can be constructed in a number of ways.

4. Next, have the students construct a KEVA figure having a volume of 2 KEVA³. Note that there are many ways to accomplish this. Some structures can be very tall; some can be low and long.

5. Write the formula for the volume of a rectangular box on the board:

V = Length x Width x Height

6. Have the students construct rectangular boxes for their neighbors to calculate the volume.