# Water Wasters

## Math Activity

Students will be surprised by how much water they can save if they brush their teeth
without leaving the water running.

**WHAT YOU NEED**

- Clean, empty one-quart milk cartons
- New toothbrushes
- Toothpaste

**WHAT TO DO**

- Have students work in groups of three for this activity.

- One student brushes his or her teeth with the water running.

- Another student fills containers with the running water until the toothbrusher has finished.

- The third student keeps track of how many quart containers are filled.

- Use the information from this activity to solve some math problems, which will in turn help students
visualize how much water can be wasted on a daily task.

**SAMPLE PROBLEM**

How many quarts of water does your family use for brushing teeth each day?

Possible solution:

Students may break the problem into the following steps:

- Multiply the number of family members by the number of times each person brushes his or her teeth per day.

- Then multiply the result by the total number of quarts of water the student group collected during one brushing.

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