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1. Earthen Dam Design Task

   out of 5 stars 

   03 Jun 2014 | Contributor(s):: Venkatesh Merwade, James Daniel Lehman

   This grade 3 design task focuses on earth materials and the construction of an earthen dam.

2. Design Team Developed: Reasons for Seasons

   out of 5 stars 

   30 Nov 2012 | Contributor(s):: James Daniel Lehman

   The Reasons for Seasons lesson, designed to meet 5th grade standards, addresses an important science concept involving the movements of the Earth around the Sun and the tilt of the Earth's rotational axis.