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In this math lesson, learners count and compare amounts of money less than or equal to one dollar.

$5 - $10 per group Ages 6 - 8 1 to 2 hours
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In this activity, learners discover how geologists use stratigraphy, the study of layered rock, to understand the sequence of geological events.

$10 - $20 per group Ages 8 - 18 1 to 2 hours
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Learners explore water's property of cohesion through two investigations.

$1 - $5 per group Ages 8 - 14 1 to 2 hours
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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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In this activity related to indoor air pollution, learners build take-home dust catchers with wax paper and petroleum jelly.

$5 - $10 per group Ages 8 - 14 1 to 2 hours
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Learners observe a model of a cell and its chromosomal DNA made from a plastic egg and dental floss. Use this model to illustrate how much DNA is held in one cell.

1 cent - $1 per group Ages 8 - 18 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 math lesson, learners use hinged mirrors to discover that regular polygons are composed of triangles tessellating around a center point.

1 cent - $1 per group Ages 8 - 11 1 to 2 hours
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In this math activity, learners use a variety of sensory modalities to gain experiences with identifying, describing and creating repeating patterns.

Over $20 per group Ages 4 - 6 1 to 2 hours
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In this geology activity, learners create a model using a mixture of salt and sand inside a CD case. When the case is tilted or inverted, the mixture dramatically sorts into a layered pattern.

$5 - $10 per group Ages 11 - 18 1 to 2 hours
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This activity (on page 3 of the PDF under GPS: Baseball Activity) is a full inquiry investigation into how "bounciness" relates to the distance a ball will fly when hit off a batting tee.

$5 - $10 per group Ages 8 - 14 1 to 2 hours
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In this activity, learners will simulate the interactions between a predator population of gray wolves and a prey population of deer in a forest.

1 cent - $1 per group Ages 8 - 14 1 to 2 hours
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In this math lesson, learners use a variety of manipulatives to explore spatial relationships of squares and their transformations.

$5 - $10 per group Ages 8 - 11 1 to 2 hours
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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 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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In this collection of demonstrations, learners explore Newton's Laws of Motion.

$10 - $20 per group Ages 11 - 18 1 to 2 hours
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In this activity, learners collect, analyze, and interpret information about objects in order to classify them into a cladogram. Use this activity to talk about how scientists classify things.

$5 - $10 per group Ages 8 - 18 1 to 2 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
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In this outdoor activity, learners search for lichen, a combination of a fungus and an alga living together. Lichen grow where most other plants cannot, on rocks, the trunks of trees, logs and sand.

$10 - $20 per group Ages 8 - 18 1 to 2 hours