The Cost of Electricity

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Does it cost more to use an electric range or a refrigerator for an hour? Scholars learn how to calculate the cost of electricity in a variety of household appliances. The focus is on the calculations and understanding that even when something is turned off, it still uses electricity if it is plugged in. 

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CCSS: Designed
Instructional Ideas

  • Extend the lesson by comparing various electric costs
  • Teach a lesson about how individuals can save money on electricity
Classroom Considerations

  • Requires small electrical appliances in order to complete, e.g. hair dryer, toaster, microwave
Pros

  • Homework solidifies the concept by relating it specifically to the appliances in pupils' own homes
  • Offers three extension ideas for the lesson
  • Walks through how to complete the calculations twice, including once with a solved example
Cons

  • None