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In this math activity related to light, learners explore why a light, such as a candle or a streetlight, looks dimmer the farther away from it we get.

In this math activity related to light, learners assemble a photometer and use it to estimate the power output of the Sun.

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.

In this activity, learners light an LED with five cents. Learners use two different metals and some sour, salty water to create a cheap battery.