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Phet
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 th
edX
edX is the online learning platform from world-leading digital education company 2U, Inc. edX was founded by Harvard and MIT as an experiment to make the world’s best education available to everyone. Today, as part of 2U, edX connects over 83 million peo