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Handy Measuring Ratio
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In this activity, learners use their hands as tools for indirect measurement.
Pocket Protractor
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In this activity, learners create angle-measuring devices--protractors--out of paper. Learners follow a series of steps to fold a square sheet of paper into a triangular Pocket Protractor.
Angle Hunting
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In this activity, learners use a hand-made protractor to measure angles they find in playground equipment.
Height Sight
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In this activity, learners build a tool called an inclinometer that can find the height of any distant object, from a tree to the North Star.
Incredible Shrinking Shapes
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In this activity, learners get hands-on experience with ratios and scaling while making their own jewelry out of recycled plastic containers.
Playground Patterns of Cracks
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In this math activity, learners observe and sketch cracking patterns in pavement.
CD Spectrometer
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In this activity, learners use a compact disc to make a spectrometer, an instrument used to measure properties of light.
Pi Graph
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In this activity, learners use a straight line to learn about circles. Learners measure and record the diameter and circumference of different sized cylindrical objects on a chart.
Mold Mole Molds
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In this activity, learners make different shapes that hold exactly one mole of gas (air).
Greeting Card Boxes
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In this activity, learners make cool boxes out of old (or new) greeting cards or postcards.