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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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In this activity, learners discover how to determine the distance to a lightning strike or nearby thunderstorm.

free Ages 6 - 14 5 to 10 minutes
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As learners play this strategy game, they develop understanding of squares, area, and perimeter. On each turn, a player draws a line between two dots next to each other on the grid.

free Ages 4 - 14 10 to 30 minutes
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In this activity, young learners will explore shapes, textures, and geometries using household materials.

free Ages 4 - 8 10 to 30 minutes
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In this activity, learners use number sense and mental math strategies to estimate the price of a sign.

free Ages 6 - 11 10 to 30 minutes
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In this activity, learners will rate the day, a book, or something else on a scale from -2 to 2. This activity works well for groups of all ages.

free Ages 4 - 14 5 to 10 minutes
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In this activity, learners get hands-on experience with ratios and scaling while making their own jewelry out of recycled plastic containers.

free Ages 11 - 14 45 to 60 minutes
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In this activity, learners discover how the extent of various wind speeds changes in each of the four quadrants around a hurricane.

free Ages 11 - 18 10 to 30 minutes
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This activity introduces the idea that computer scientists measure information by how "surprising" a message is.

free Ages 8 - 14 30 to 45 minutes
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In this fun math activity (page 5 of the pdf), learners will help a secret agent crack a case by solving math problems.

free Ages 8 - 11 30 to 45 minutes
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In this activity, learners will build the highest tower they can out of recycled materials.

free Ages 4 - 14 45 to 60 minutes
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As learners play this game, they build skills in area, perimeter, multiples and factors. They take turns making rectangles with 12 squares on the grid.

free Ages 4 - 14 10 to 30 minutes
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In this quick activity about size and scale (on page 2 of the PDF under What's Nano?

free Ages 8 - 14 10 to 30 minutes
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In this online activity, learners will brush up on their multiplication, division, and factoring skills with this exciting game.

free Ages 8 - adult 10 to 30 minutes
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In this activity, learners will plan a snack within a budget. With a $20 limit (theoretical) to spend on snack for everyone, learners look over grocery store circulars and make their shopping lists.

free Ages 6 - 14 45 to 60 minutes
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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.

free Ages 6 - 18 5 to 10 minutes
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This is a web activity about simple machines. Learners will explore a lawn mower and identify six different simple machines which work together to help make our lives easier.

free Ages 8 - 11 Under 5 minutes
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In this activity, learners make cool boxes out of old (or new) greeting cards or postcards.

free Ages 11 - 14 30 to 45 minutes
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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.

free Ages 14 - 18 1 to 2 hours
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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.

free Ages 11 - 18 10 to 30 minutes