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Public Key Encryption: Kid Krypto
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In this activity, learners conduct a simulation exercise related to public key encryption and try to intercept a message sent between two learners.

The Poor Cartographer: Graph Coloring
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In this activity, learners help a poor cartographer color in the countries on a map, making sure each country is colored a different color than any of its neighbors.

Divide and Conquer: Santa's Dirty Socks
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This activity introduces the idea of "divide and conquer" using a fictitious but serious problem--a pair of dirty socks has accidentally been wrapped in one of the presents that Santa is about to deli

Patterns in Pixels
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This activity (page 2) draws upon a familiar, computer-based concept related to visual resolution: pixilation.

Phylogenetics
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This activity lets learners participate in the process of reconstructing a phylogenetic tree and introduces them to several core bioinformatics concepts, particularly in relation to evolution.

Fruity-Glows: Pictures of Health on a Microarray Canvas
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In this activity (page 12), learners apply the concepts of pixilation and pointillism to the world of biomedical science.