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Before there were clocks, people used shadows to tell time. In this outdoor activity, learners will discover how to tell time using only a compass, a pencil, a handy printout, and a sunny day.

In this math activity, learners jump and measure how far they can jump on different surfaces using different jumping techniques.

In this activity, learners explore and experiment how we can use our bodies everyday to get from one place to another.

In this meteorological activity, learners get to build their very own anemometer (instrument for measuring wind speed) using a paper cup.

In this math activity, learners observe and sketch cracking patterns in pavement.

In this activity, learners explore how polarizing sunglasses can help diminish road glare.

In this activity (page 1 of the PDF under SciGirls Activity: Double Dutch), learners will stand twelve feet apart swinging a rope at the slowest tempo possible while someone uses a stopwatch to record

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.

In this activity, learners use a simple 3D model to discover why the Moon has phases.

In this activity, learners model ancient lunar impacts using water balloons.

In this activity, learners model a population of deer and see how the number of deer changes over time.

In this quick activity (page 1 of PDF under SciGirls Activity: Lift Off), learners will use the ever-popular soda geyser experiment to test the reactivity of the various sugar candies or mints.

In this activity on page 13 of the PDF, use a special plastic card that has been painted with a chemical that changes color when it is in UV light.

In this activity, learners make their own pinhole viewer in order to measure the size of the sun.

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

How do scientists measure how clear or murky water in a lake is? How does water clarity (clearness) affect what lives in the lake?

In this activity, learners measure the diameter of their water balloons, model an impact, measure the diameter of the “crater” area, and determine the ratio of impactor to crater.

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

In this activity, learners help create and then navigate an outdoor course of the traditional "planets" (including dwarf planet Pluto), which are represented by small common objects.

In this activity, learners use cooperation and logical thinking to find solutions to network problems on the playground.