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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

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

Even fast computers are limited to how quickly they can solve problems. One way to speed things up is to use several computers at once.

In this activity, learners make their own encrypted code to pass along secret messages using a printable cipher wheel.

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 design miniature cars. Learners can create a telephone car, soccer car, merry-go-round car, or any other theme car they can imagine.