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