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Learners design, build, and test models of "dragon boats" made from up to three milk cartons.

In this activity, learners discover how their heart rate changes in different situations.

In this design challenge activity, learners invent an emergency shelter that can fit a person and is sturdy and quick to build.

This activity about cryptographic techniques illustrates how to accomplish a simple, but nevertheless seemingly impossible task—making a fair, random choice by flipping a coin between two people who d