It'll take as long as it'll take. After watching a short video clip of someone moving a lawn as well as a running stopwatch, pupils estimate how long it would take to mow the entire lawn. Provided diagrams show the dimensions of the lawn and the lawnmower to help with the task.

Concepts

proportional reasoning, linear relationships, linear functions, rates, estimation

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Additional Tags

math

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Instructional Ideas

• Get pupils to determine how long it would take to mow their own back yards or local parks
  

Classroom Considerations

• Learners should be able to convert between units
• Familiarity with proportions and rates is necessary
  

Pros

• Simple task that teenagers relate to—mowing lawns
  

Cons

• Opening each image and video separately is a bit tedious
  

Common Core

6.RP.A.3.a