Wonderful site full of useful simulations, videos, games, and other tools to aid in any classroom.
ThingLink is a useful tool to create models and embed/anchor descriptions on particular parts of their models. You can also embed youtube videos and other fun stuff as well. Great for presenting ideas to students, or having students create a model to show you what they know
*does not yet integrate with google classroom.
Ever wish you could put several sites/videos on one page? Versal allows you to do that as well as incorporate other tools including quizzes, model labeling, category card sorts, and timelines. It takes a little prep time, but the kids love it!