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Playground Patterns of Cracks
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In this math activity, learners observe and sketch cracking patterns in pavement.

Stride Ruler
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In this activity, learners use their feet to estimate distances. Learners calculate the distance of one step in centimeters by measuring 10 steps at a time to reduce measurement error.
More Bubbles!
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In this math activity, learners make their own bubble wands and determine if the size of the wand affects the number of bubbles it produces.

Traveling Networks
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In this geometry activity, learners explore networks painted on playgrounds, such as a four square court, and draw their own.

Handy Measuring Ratio
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In this activity, learners use their hands as tools for indirect measurement.
Filling the Time
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Build time sense into the schedule by asking learners to predict what can happen in a certain amount of time: We have 20 minutes before outdoor time. What can you get done?

Measure the Sun's Size
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In this activity, learners make their own pinhole viewer in order to measure the size of the sun.

The Shadow Knows II
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In this activity, learners will measure the length of a shadow and use the distance from the equator to calculate the circumference of the earth.

Oil Spot Photometer
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In this math activity related to light, learners assemble a photometer and use it to estimate the power output of the Sun.