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Learners build a filter from old soda bottles and dirt. They create polluted water, and pour it through their filter to clean it.

$1 - $5 per group Ages 11 - 18 30 to 45 minutes
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In this activity, learners build a game that tests their steadiness. Learners construct the game board by setting up an electrical circuit and a wand.

$5 - $10 per student Ages 6 - 11 10 to 30 minutes
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This lesson focuses on how materials behave differently as their surface area increases.

$1 - $5 per group Ages 8 - 14 1 to 2 hours
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Learners display their findings after a study of surface area and volume. They build a mobile to show a commercially available box and a constructed cubical box of the same volume.

1 cent - $1 per student Ages 11 - 14 1 to 2 hours
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In this activity, learners build a carousel toy that spins when pushed down.

$5 - $10 per student Ages 8 - 18 45 to 60 minutes
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In this archaeology activity, learners consider ways in which excavating an underwater site is different from excavating a terrestrial site.

$5 - $10 per group Ages 8 - 14 45 to 60 minutes
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In this multi-part activity learners examine non-point water pollution.

free Ages 6 - adult
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In this demonstration, learners discover that nanoparticles behave differently, in part because they have a high surface area to volume ratio.

Over $20 per group Ages 6 - adult 10 to 30 minutes
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In this activity, learners will use Google Sky to observe features of the night sky and share their observations.

free Ages 4 - 11 10 to 30 minutes
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In this activity, learners conduct a simulation exercise related to public key encryption and try to intercept a message sent between two learners.

free Ages 11 - 18 30 to 45 minutes
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Learners use shop tools and various materials to construct a magnetic spinner and a compass.

$1 - $5 per student Ages 8 - 14 1 to 2 hours
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In this engineering challenge, learners design and build a crane out of cardboard to see how heavy a load it can lift.

$1 - $5 per group Ages 11 - 18 45 to 60 minutes
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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.

$5 - $10 per group Ages 14 - 18 1 to 2 hours
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In this activity, learners discover that some things only stand up while they are spinning.

$1 - $5 per student Ages 8 - 14 1 to 2 hours
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This activity explores the main algorithms that are used as the basis for searching on computers, using different variations on the game of battleships.

1 cent - $1 per group Ages 8 - adult 30 to 45 minutes
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Working in teams of four, learners build tetrahedral kites following specific instructions and using specific materials.

$1 - $5 per group Ages 11 - 14 45 to 60 minutes
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In this two part activity, learners become draft detectives by constructing their own draft catchers to detect drafts around windows or doors.

$5 - $10 per student Ages 4 - 14 10 to 30 minutes
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This great "re-use it" activity will demonstrate how to transform a greeting card into a box. Once constructed, the box can have many uses like holding special notes or keepsakes.

1 cent - $1 per student Ages 6 - 14 5 to 10 minutes
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In this activity, learners explore how the hull shape impacts a ship's performance and stability.

$10 - $20 per group Ages 11 - 18 2 to 4 hours
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Somatic Cell Nuclear Transfer (SCNT) is a cloning method that involves transferring a nucleus from a somatic cell of the individual to be cloned to an enucleated egg.

1 cent - $1 per group Ages 11 - 18 1 to 2 hours