8th Grade Chemistry : Explore molecule shapes by building molecules in 3D. Find out how a molecule's shape changes as you add atoms to a molecule : This is a Project at the University of Colorado Boulder
Founded in 2002 by Nobel Laureate Carl Wieman, the PhET Interactive Simulations project at the University of Colorado Boulder creates " free interactive " math and science simulations. PhET sims are based on extensive education research and engage students through an intuitive, game-like environment where students learn through exploration and discovery.