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In this optics activity, learners discover basic lens-making techniques by using a tennis ball to make a lens out of ice.

In this seismic simulation, learners play a "who-dunnit" game to explore earthquakes.

This activity is designed to accompany the PBS documentary about African-American chemist "Percy Julian: Forgotten Genius." Learners look through two cups with small holes in them to simulate what it'

This activity explores what it means for a computer to be intelligent and introduces the topic of what a computer program is and how everything computers do simply involves following instructions writ

In this field study, learners discover how to collect data in the field and how their efforts can help certain animals, specifically, amphibians.