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Batter Up!
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This activity (on page 3 of the PDF under GPS: Baseball Activity) is a full inquiry investigation into how "bounciness" relates to the distance a ball will fly when hit off a batting tee.
Mercury in the Environment
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In this environmental science lesson, learners will examine the dangers of mercury and how humans contribute to growing mercury emissions on Earth.

Fragile Waters
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In this activity (on pages 18-29) learners explore the impact of the March 24, 1989 oil spill in Alaska caused by the Exxon Valdez tanker.

Toxic Popcorn Design Challenge
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In this activity, learners explore the engineering design process (EDP)—the process engineers use to solve design challenges.

Positive Planning Adds Up
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In this drawing/mapping activity, learners design plots of land while incorporating positive strategies for improving water quality.

I Want to Hold Your Hand
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In this activity, learners construct a robot-like hand to demonstrate how data is collected when using robotic technology.

Rotational Equilibrium
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In this activity, learners explore the concept of rotational equilibrium. Learners work in teams to estimate and determine the force within a mobile design.

Balsa Towers
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Learners work in groups to design and build a tower out of balsa wood. As a motivator, they can compete to build a tower with the highest strength-to-weight ratio.

Scribbling Machines
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In this activity, learners explore electronics and motion by making a Scribbling Machine, a motorized contraption that moves in unusual ways and leaves a mark to trace its path.

Not Just A Bag Of Beans
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In this activity, learners count and measure kidney beans to explore natural selection and variation. Learners measure the length of 50-100 beans.

Insulators and Conductors
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In this activity, learners explore the concept of conducting or insulating electricity.

Stroboscope
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In this activity (posted on March 20, 2011), learners follow the steps to construct a stroboscope, a device that exploits the persistence of vision to make moving objects appear slow or stationary.

Camera Projector
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In this activity (posted on March 14, 2011), learners follow the steps to construct a camera projector to explore lenses and refraction.

Propeller-Powered Car
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In this activity, learners construct cars that are powered by hand-made, electric propellers.

Smooth Operator
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In this activity, learners explore surgical instrument design. Teams of learners construct surgical instruments from everyday materials.

Cardboard Automata
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Cardboard Automata are a playful way to explore simple machine elements while creating a mechanical sculpture.

Make Your Own Batteries!
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This activity (on page 3 of the PDF under GPS: Body Electricity Activity) is a full inquiry investigation into conductivity.

Bookshelf
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In this activity, learners use simple tools to build a bookshelf with a built-in bookend.

Cooking With the Sun
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In this activity, learners build a simple solar oven out of household materials to melt chocolate and marshmallow between graham crackers--known as s'mores.

Dispenser Designs
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In this activity, learners explore how engineers work in a team to solve problems.