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In this activity, learners will explore pi and the mathematical relationships between a circle's diameter, circumference, and radius.

$1 - $5 per student Ages 8 - 18 10 to 30 minutes
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In this online activity, learners build their own system of heavenly bodies and watch the gravitational ballet.

free Ages 11 - adult 10 to 30 minutes
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In this pencil and paper activity, learners work in pairs and simulate how astronomical spacecraft and computers create images of objects in space.

1 cent - $1 per group Ages 8 - 14 30 to 45 minutes
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In this Cyberchase activity, use grid coordinates to share secret pictures with a friend. Color squares of a grid to make a picture (like a smiley face) that you keep hidden from the other person.

1 cent - $1 per student Ages 8 - 11 10 to 30 minutes
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Can gelatin (like Jell-O ®) change the speed of light?

$5 - $10 per group Ages 14 - 18 1 to 2 hours
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In this activity, learners will predict the size of a giant scale model of a comb or other rectangular object, then make one. If you tripled the size of a dollar bill, could you sit on it?

1 cent - $1 per group Ages 6 - 14 45 to 60 minutes
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In this activity, learners use a straight line to learn about circles. Learners measure and record the diameter and circumference of different sized cylindrical objects on a chart.

$1 - $5 per group Ages 11 - 18 30 to 45 minutes
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Create beautiful spirals by drawing a straight line. This sounds crazy, but you can with a turntable (a record player or lazy susan), paper, and pen.

1 cent - $1 per student Ages 4 - 14 5 to 10 minutes
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In this activity (on page 2 of the PDF under GPS: Luge Activity), learners will construct a model hovercraft out of an empty spool and a piece of cardboard.

1 cent - $1 per student Ages 8 - 14 45 to 60 minutes
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In this calculus activity, learners use a classic problem of geometrical probability to find an important mathematical constant (pi).

$1 - $5 per group Ages 14 - 18 10 to 30 minutes
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In this activity about light and reflection, learners use a special device called a Mirage Maker™ to create an illusion.

Over $20 per student Ages 8 - 14 5 to 10 minutes
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In this quick activity (page 1 of the PDF under SciGirls Activity: Tug O' War), learners will test how many pennies a flat paper index card bridging the gap between two stacks of books is able to supp

1 cent - $1 per group Ages 8 - 14 10 to 30 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 activity, learners make their own "tornado" using two soda bottles and water.

free Ages 4 - 11 10 to 30 minutes
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In this activity, learners discover that one way to cool an object in the presence of a heat source is to increase the distance from it or change the angle at which it is faced.

1 cent - $1 per group Ages 8 - 14 1 to 2 hours
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This activity (on page 2 of the PDF under SciGirls Activity: Kites) is a full inquiry investigation into how a kite’s shape affects its performance.

Over $20 per group Ages 8 - 14 1 to 2 hours
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¡Este juego de estrategia tiene reglas sencillas pero puede ser un reto! Los jugadores empiezan con una red de hexágonos vacía. En su turno cada jugador pone su inicial en un hexágono vacío.

free Ages 8 - 14 10 to 30 minutes
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In this activity, learners explore how and why rainbows form by creating rainbows in a variety of ways using simple materials. Learners create rainbows indoors and outdoors.

1 cent - $1 per student Ages 6 - 11 5 to 10 minutes
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In this math-based activity, learners model the intensity of light at various distances from a light source, and understand how astronomers measure the amount of sunlight that hits our planet and othe

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