How fast are those thumbs? Pupils view a short video showing a person typing out a text message in a speed challenge. They use the information they can glean from the video to estimate the number of seconds it will take to completely type the message shown.

Concepts

ratios, rates, estimation, proportional reasoning

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Instructional Ideas

• Use the resource as part of the closure section of a lesson on proportional relationship
  

Classroom Considerations

• Scholars should have experience with rates and proportional relationships
• Knowledge of estimation strategies is necessary
  

Pros

• Highlights the relevance of mathematics to daily life
  
• Includes the answer in the form of a video
  

Cons

• None

Common Core

7.RP.A.1 7.RP.A.2.a 7.RP.A.2.b 7.RP.A.2.c 7.RP.A.2.d 7.RP.A.3