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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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This activity lets you program your 'robot' (a willing friend) to pick up and dispose of some 'toxic waste' using as few commands as possible.

1 cent - $1 per group Ages 8 - 18 10 to 30 minutes
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In this math lesson, learners apply the concepts of ratio and proportion to determine the length of the Statue of Liberty's torch-bearing arm.

1 cent - $1 per group Ages 11 - 14 45 to 60 minutes
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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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In this math lesson, learners learn how to construct stem and leaf plots. Learners first estimate the number of drops of water that will fit on the head of a penny.

1 cent - $1 per group Ages 11 - 14 45 to 60 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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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
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Learners trace, cut out and fly a boomerang, outdoors or in a large indoor space.

1 cent - $1 per student Ages 4 - 14 10 to 30 minutes
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In this activity, learners will conduct an open-ended survey, and then organize and analyze results. What languages does everyone speak? What’s the most common? the least common?

1 cent - $1 per group Ages 6 - 14 5 to 10 minutes
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In this activity (on pages 41-47 of PDF), learners explore tesselating geometric patterns (repeated shapes, similar to the art of M.C. Escher).

1 cent - $1 per student Ages 4 - adult 45 to 60 minutes
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In this activity (18th on the page), learners conduct an experiment to examine memory.

1 cent - $1 per student Ages 11 - 18 45 to 60 minutes
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In this activity, learners discuss and investigate how cameras, telescopes, and their own eyes use light in similar ways.

1 cent - $1 per student Ages 11 - 14 45 to 60 minutes
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In this inquiry-based lesson, learners measure the biomass of trees, calculate the carbon stored by the trees, and use this information to create recommendations about using trees for carbon sequestra

1 cent - $1 per student Ages 11 - 14 1 to 2 hours
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In this activity, learners discover that they can modify a regular piece of paper so that it's large enough for them to walk through!

1 cent - $1 per student Ages 8 - 14 Under 5 minutes
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Align four color transparencies, each one a single color (cyan, magenta, yellow, and black), and see a beautiful full color image.

1 cent - $1 per student Ages 6 - 14 Under 5 minutes
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In this activity, learners "dance" (move back and forth at varying speeds) by reading a graph. This is a kinesthetic way to help learners interpret and understand how motion is graphed.

1 cent - $1 per group Ages 11 - 18 10 to 30 minutes
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Learners cut and fold a paper helicopter from the template in this PDF. They practice twirling the helicopter and observe what happens as they modify their tries.

1 cent - $1 per student Ages 4 - 14 10 to 30 minutes
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Make a kite out of a garbage bag, shower curtain, painting tarp--anything light, thin, flexible and plastic!

1 cent - $1 per student Ages 6 - 14 45 to 60 minutes
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In this activity, learners build a paper stellated rhombic dodecahedron, a three-dimensional 12-pointed star.

1 cent - $1 per group Ages 11 - 14 1 to 2 hours
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In this math puzzle game, learners work together to use algebraic reasoning and fun clues for solving word puzzles.

1 cent - $1 per group Ages 8 - 14 45 to 60 minutes