Math

a blue and yellow label that says Phet Interactive Simulations with a paper airplane flying off of the h

Free interactive math and science simulations. PhET sims are based on extensive education research and engage students through an intuitive, game-like environment.

a blue circle with a white ellipse and a red mark stretching from one side and back to the other. The letters NASA are written in white across the

The latest news, images, and videos from America's space agency, pioneering the future in space exploration, scientific discovery, and aeronautics research.