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In this online interactive, learners first explore the great American inventors and their inventions as well as the role of the National Park Service. Then, learners investigate how Edison's...

SMMconstructor is an online construction kit for building animated models. Based on the original construction kit called Sodaconstructor, this simulator lets you construct virtual models with a few...

This simulated balance beam illustrates binary mathematics. You have a set of weights and the goal is to match an unknown weight, but you only have weights that have mass 1, 2, 4, 8, and 16. You...

In this activity, learners explore the parts of a circuit by modeling, as a group, a “human” circuit. Learners investigate the conditions necessary for a circuit to work and model open and closed...

In this activity, learners listen to songs and decode hidden messages based on the same principle as a modem. As a final challenge, learners decode the binary messages in a music video. This is an...

This online activity lets learners explore how computer programs called "CAPTCHAS" work to test whether you are a human or a computer. Learners will be tested with a series of visual...

This computer interactive lets you explore the effect of changing the number of colors and resolution of a picture. You can see the picture in high quality (72 dots per inch), low quality (10 dpi),...

The Game of Life is a simple computer simulation of what is called a "cellular automaton." Developed by the British mathematician John Conway in 1970, the program uses the cells of a grid...