Lesson Plan

What is the Cost of Inefficiency?

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This What is the Cost of Inefficiency? lesson plan also includes:

What does it cost to keep the lights on? Through a hands-on activity, class members use a watt meter and determine the amount of energy different types of light bulbs use. The class then determines the financial and environmental cost of running appliances for one year. This is lesson plan three in a 19-part series.

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Instructional Ideas
  • In addition to lights, have other electrical appliances available to test with the Kill A Watt meters
  • Provide additional practice in the calculations needed for this exercise
Classroom Considerations
  • Several Kill A Watt meters will be needed
  • The class will need easy access to electrical outlets or extension cords
  • Third in a 19-part series
Pros
  • The lesson plan provides extension activities
  • Worksheets come with an answer sheet
Cons
  • Cost and carbon dioxide per kilowatt information is from 2011