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Wikipedia has a wonderful summary of the tragedy of the commons. It includes an excellent review of Hardin’s original essay on the topic, historical background about where the concept of the commons originated, and many examples of modern commons problems: littering, air quality, water quality, population growth, logging, etc.
Share your best hands-on lessons and teaching ideas with your fellow teachers!
45-50 minutes back in classroom the following day to discuss, review, and consolidate field observations
If you are using the Exploratorium Learning Studio's computers to add lessons to My Science Box, here's some notes on the various computers:
On December 9, 2006 I led a workshop for new teachers called "Web Wonders and Wizardry". A main feature of the workshop was a list of websites recommended by myself and other educators. Here's the list for everyone to enjoy!
Portals and Search Engines
Here's a great web resource: