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Learners work in teams to design and build solar water heating devices that mimic those used in residences to capture energy in the form of solar radiation and convert it to thermal energy.

$10 - $20 per group Ages 14 - 18 1 to 7 days
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In this activity, learners calculate the number of milliliters of water a nearby tree transpires per day.

$1 - $5 per group Ages 14 - 18 4 to 24 hours
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In this chemistry activity, learners use the lowered freezing point of water to chill another mixture (ice cream) to the solid state.

$1 - $5 per student Ages 6 - 18 10 to 30 minutes
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In this math lesson, learners explore linear patterns, write a pattern in symbolic form, and solve linear equations using algebra tiles, symbolic manipulation, and a graphing calculator.

1 cent - $1 per group Ages 14 - 18 45 to 60 minutes
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In this design and physics challenge, learners construct a cylindrical wing, fly it, make modifications, and determine how the changes affect flight patterns.

1 cent - $1 per student Ages 8 - 18 45 to 60 minutes
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In this activity, learners will measure the length of their shadow from the Sun and compare it three to four months later.

free Ages 6 - 14 1 to 12 months
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In this weather forecasting activity, learners determine the location of cold and warm fronts on weather plot maps.

free Ages 8 - 18 45 to 60 minutes
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In this activity about cartography, learners work in teams to create two different map projections: a planar (or polar) and a cylindrical (or Mercator) projection.

1 cent - $1 per group Ages 11 - 18 45 to 60 minutes
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In this activity, learners explore mammal locomotion by constructing flipbooks.

$1 - $5 per student Ages 6 - 14 10 to 30 minutes
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In this online activity, learners will explore size estimation in one, two and three dimensions. Multiple levels of difficulty allow for progressive skill improvement.

free Ages 6 - adult 10 to 30 minutes
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Learners use a spring scale to drag an object such as a ceramic coffee cup along a table top or the floor.

$5 - $10 per group Ages 11 - 14 45 to 60 minutes
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Jugando a este juego de estrategia, los chicos desarrollan su entendimiento de área y perímetro. En su turno, cada jugador hace una línea entre dos punto contiguos en la cuadrícula.

free Ages 8 - 14 10 to 30 minutes
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In this activity, learners explore how the application of nano-sized "whiskers" can protect clothing from stains.

Over $20 per group Ages 4 - adult 5 to 10 minutes
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In this activity, learners use a compact disc to make a spectrometer, an instrument used to measure properties of light.

$1 - $5 per student Ages 11 - 18 30 to 45 minutes
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In this online activity, learners crack the special code imprinted on envelopes to help the U.S. Postal Service deliver the mail.

free Ages 8 - 14 5 to 10 minutes
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In this activity, learners conduct an experiment to find the volume of one mole of gas. Learners capture sublimated gas from dry ice in a ziploc bag and use water displacement to measure its volume.

$1 - $5 per group Ages 11 - 18 45 to 60 minutes
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Using information from the My Place in Space lithograph, learners write and/or draw a postcard to friends and family as if they had gone beyond the interstellar boundary of our Solar System, into the

1 cent - $1 per student Ages 6 - 11 10 to 30 minutes
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In this math activity, learners observe and sketch cracking patterns in pavement.

1 cent - $1 per student Ages 11 - 18 10 to 30 minutes
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In this activity, learners explore how polarizing sunglasses can help diminish road glare.

$1 - $5 per student Ages 8 - 14 10 to 30 minutes
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In this activity, learners slide shapes to create unusual tiled patterns.

1 cent - $1 per student Ages 8 - 11 30 to 45 minutes