Which requires more water--a bath or a shower? Given some specific criteria, learners attempt to answer the question. A video shows how long it takes to fill a gallon container using a faucet and a shower head. Using that information and the cost per unit of water, scholars compare the cost of taking a shower and a bath. 

Concepts

rates, unit rates, ratios, proportions, math modeling

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Additional Tags

math

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Instructional Ideas

• Use as a performance task when studying unit rates and ratios
• Have pupils determine the flow rate of their own faucets and shower heads to use in the calculations

Classroom Considerations

• Requires a proficiency making calculations with proportions

Pros

• Offers suggestions to extend the lesson for more advanced classes
• Incorporates a real-life scenario to practice math modeling

Cons

• None

Common Core

6.RP.A.3.a MP4