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This is an online exhibit about color perception. Learners set a random background color and then try to mix red, blue, and green light to match.

In this online activity, learners make a whole rainbow by mixing red, green, and blue light. They can change the wavelength of a monochromatic beam or they can filter white light.

In this activity, learners create a water prism to break light into the seven colors of the rainbow.

In this activity, learners use their imaginations and picture a scene in their heads.

In this international citizen science activity, learners measure their night sky brightness and submit their observations into an online database.

Learners explore their surroundings while reasoning about categories and counting.

Use this Moon Map Guide to help learners identify features on the Moon, while looking through a telescope.