This introductory video describes the basic principles of residential geothermal heat pumps.
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More information is given at http://www1.eere.energy.gov/geothermal/.
Because this has a residential focus, teachers should discuss the capital cost of geothermal systems as they are expensive to install (Capital Cost of $20k - $35k) and costs vary depending on location/ease of drilling.
The video only addresses the lower operating costs of a geothermal heat pump. Cost estimator link:
For a simple explanation of the different types of geothermal heat pump configurations for residential applications, see the following link:
This video shows how geothermal heat pumps extract clean, reliable, renewable energy using the heat from beneath Earth's surface.
Such heat pumps can assist in minimizing the amount of energy required for heating or cooling buildings.
Passed initial science review - expert science review pending.
Diagrams are well done and helpful for understanding.