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Open Heart: Disease and Diagnosis
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In this online activity about heart disease, learners will pick one of three patients (based on actual patient histories) and help a cardiologist diagnose and prescribe treatments for him or her.

Squishy Soil
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In this activity, learners will investigate the part of soil. Explore how clay, silt, and sand make up the dirt in your background. Activity includes step-by-step instructions and extension ideas.

West Coast Shipwrecks
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In this data activity, learners will explore shipwrecks from four National Marine Sanctuaries on the West Coast of the United States.

Built in Stopwatch
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In this activity (3rd on the page), learners investigate circadian rhythms by examining how well people do with estimating time.

Construct a Heart Circulation Model
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In this online activity about anatomy, learners will correctly order the path blood takes through the heart in order to absorb oxygen to deliver to the rest of the body.

Arithmetic
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In this online activity, learners will brush up on their multiplication, division, and factoring skills with this exciting game.

Measure Yourself in Nanometers
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In this activity, learners will be able to measure themselves in nanometers. A nanometer is a billionth of a meter, a unit of measurement used in nanotechnology.

Making Music in Nature
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In this activity, learners will explore the ways natural materials can produce sounds. Appropriate for any age, learners can make individual music or create a symphony with others.

Motion Madness: Choose the Winner
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This is an online game that explores speed, range and momentum. Learners will pick the winners in a 16-team tournament in 3 events: Tug-o-war, sprint, and marathon.

Building Molecules
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This online interactive has three activities in the NanoLab (press the upper right button): Build, Zoom, and Transform.

For the Birds: Environmental Effects on Population
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In this activity, learners will investigate how shorebirds and seabirds are extremely vulnerable to changes in their environment, whether human-induced or otherwise.

Plastic Bag Creations
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In this activity, learners will reuse plastic bags in an interesting way.

Prehistoric Climate Change
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In this online interactive, learners use fossils to infer temperatures 55 million years ago, at the sites where the fossils were found.

Mid-Air Maneuver: Skateboard Science
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To understand how skaters turn in midair, try this little experiment! Individuals can do this activity alone, but it works better with a partner.

Experiencing Parallax With Your Thumb
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In this activity, learners investigate parallax, a method used to measure distances to stars and planets in the solar system.

Describing Oak Leaves
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Learners work in teams to investigate how scientists use physical characteristics to classify living things.

Masses & Springs
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In this online activity, learners use a realistic mass and spring laboratory. They hang masses from springs and adjust the spring stiffness and damping.

Human Interface Design: The Chocolate Factory
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In this activity about human interface design issues, learners help the Oompa-Loompas of a great chocolate factory solve different problems.

Mapping the Classroom
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In this activity, learners discover the importance of maps and scale as they work together to create a map of the classroom.

The Carbon Cycle: How It Works
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In this game, learners walk through an imaginary Carbon Cycle and explore the ways in which carbon is stored in reservoirs and the processes that transport the carbon atom from one location to another