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Breaking the Code: Mayan Math
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This is a lesson plan for an activity in which learners, playing the role of archeologists, use math concepts about number bases to decipher the Dresden Codex, an ancient Mayan document.

The Thousand-Yard Model
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This is a classic exercise for visualizing the scale of the Solar System.

Pico Cricket Compass
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Learners can program a compass to draw a circle by itself using a Pico Cricket, some Legos, and lots of tape! Pico Cricket is required.

Home Water Audit
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This activity offers learners and their families several ways to raise their awareness together about home water.

Slide Rules
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Learners make their own simple slide rules out of paper and learn how they work.