Exploratorium

Website of the Exploratorium: Museum of Science, Art and Human Perception in San Francisco. No courseware, but links to some fabulous multimedia and interactive features and offline "things to make and do" activities that the museum has developed on a wide range of topics related to math, science, art, and human understanding. Elementary school to adults. The Exploratorium also offers two apps, "Sound Uncovered" and "Color Uncovered," which are free, interactive iPad books.