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In this activity, learners create a mind and math puzzle that requires a three-dimensional solution.

In this web-based activity, learners try to figure out who in an online chat room has their matching puzzle piece.

In this activity, learners use a fictitious map of "Tourist Town" and counters to problem solve how to place ice-cream vans on street intersections so that every other intersection is connected to one

In this activity, learners construct three math puzzles out of simple materials like wood, string, and Styrofoam.

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