Curated OER
Erosion
Young scholars design and conduct an open-ended investigation using a variety of earth materials to answer a questions posed by the teacher: How does the erosion of sand compare with the erosion of gravel? After producing evidence that...
![A Magic Classroom: Nail Balance Puzzle [Pdf] Activity](https://d15y2dacu3jp90.cloudfront.net/images/attachment_defaults/resource/large/FPO-knovation.png "A Magic Classroom: Nail Balance Puzzle [Pdf] Activity")
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A Magic Classroom: Nail Balance Puzzle [Pdf]
In this lesson, students try to balance fourteen nails on the head of one nail by outwitting gravity.