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In this activity, learners use sieves with different-sized holes to sort balls by size.

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 activity, learners construct a coastal landmass from sand and add features such as tidal creeks and barrier islands.

This fun and simple hands-on astronomy activity lets learners imagine what would happen if our Sun were replaced with a black hole.