Chemistry ::  VSEPR Shapes:: Memorizing Bond Angles and Polarity 

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• The interactive tools you see being used is called PhET.
  
• PhET has lots of free (and totally visual) interactive simulations for Science and Math. (Founded in 2002 by Nobel Laureate Carl Wieman).
  
• The PhET Interactive Simulations project was created at the University of Colorado Boulder.
  
• Link to PhET's YouTube Channel
  
• The simulations can be found here..
  

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