If you haven't yet heard about LiveBinders, it is a site that allows the creation of digital notebooks or binders -- the digital version of those three ring binders that pile up in our classrooms. You can explore teacher created and curated binders or create your own specialized binders for substitute information, parent resources, or course content.
"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."