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Trevor Caesar
November 30, 2010 02:11PM

This was a great resource for my students. For more info on the hydrologic cycl...
Lenny Thyme
November 23, 2010 07:11PM

Please check the links on the photos - the concept of energy may need some rethi...
Cliff Lyon
July 06, 2010 01:07PM

Great market Feed! Thanks Les!
Lucy Kerr
September 17, 2008 12:09PM

Wow, what a wonderfully clear survey of Energy science. Perfect for my high sch...

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