Moooove over, there's a better deal over there! The fourth segment in a series of eight requires individuals to determine the best unit cost for milk. Scholars calculate the least amount they can spend on a particular quantity of milk. To test their answers, classmates troubleshoot the calculations using unit rates.

Concepts

ratios, constant of proportionality, proportional reasoning, proportions, cost, cost analysis, unit rates, milk

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Additional Tags

math

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Instructional Ideas

• Calculate the price of the individual containers if they are at the same unit cost of the most expensive and least expensive options
• Bring in several grocery store ads to determine the best place to purchase specific products based on unit price

Classroom Considerations

• Pupils should be familiar with unit rates

Pros

• The scoring guide provides alternative acceptable responses
• Includes the distribution of points for each part of the task

Cons

• None

Common Core

7.RP.A.1 7.RP.A.2.a 7.NS.A.3 MP1