These units/lessons/activities are more engaging than the typical middle school earth science textbook!

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December 2025 Editor's Pick

The Dragging Dilemma: Overcoming Friction to Move Rocks

Students explore the concept of dragging friction and participate in an activity to understand the cultural significance of the minga tradition. They then apply this knowledge to design a method for transporting materials up a hill. Their solution must reduce friction ...

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Free K-12 standards-aligned STEM curriculum for educators everywhere.
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