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In this activity, learners build inexpensive pulley assemblies from pulley wheels used for sliding screen door replacement or from clothesline spreaders.

In this activity, learners explore the concept of rotational equilibrium. Learners work in teams to estimate and determine the force within a mobile design.

Get all wrapped up in a lesson about skin!

In this activity, learners simulate Otto von Guericke's famous Magdeburg Hemispheres experiment.