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Evaluate Examples for Illustrating Strategies
Grade Level
Praxis Core
5165.283 Evaluate Examples for Illustrating Strategies
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A teacher is choosing an example to emphasize units in mathematical modeling. Which example best demonstrates the practice?
A
Write V = 12 + 3t and focus only on getting numeric answers for t = 5 and t = 10.
B
Model water filling a tank at 3 gallons per minute for t minutes with V = 12 + 3t, label 12 gallons, 3 gallons per minute, and t minutes, and check that units produce gallons.
C
Use mixed units such as gallons and liters without conversion so students can practice arithmetic with realistic numbers.
D
Ignore units until the final answer because equations are unit-free mathematical objects.
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