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In this activity, learners overlap the three primary colors to see how all other colors are made.

In this activity (6th on the page), learners investigate how photoreceptors in the eye (rods and cones) "adapt" to low light conditions.

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

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