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In this activity (p.25 of PDF), learners investigate spores. Mushrooms produce millions of spores which are equivalent to the seeds of plants but without the massive food reserves.

1 cent - $1 per student Ages 11 - 14 2 to 4 hours
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In this craft activity, learners will recognize, name, and compare the fractions 1/2, 1/4, and 1/8 by constructing a penguin out of portions of paper circles.

$1 - $5 per group Ages 4 - 11 30 to 45 minutes
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In this quick activity/demonstration about density, learners examine what happens when two cans of root beer--one diet and one regular--are placed in a large container of water.

1 cent - $1 per group Ages 4 - 14 Under 5 minutes
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In this activity, learners build edible models of DNA, while learning basic DNA structure and the rules of base pairing.

$5 - $10 per group Ages 8 - 18 45 to 60 minutes
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This is an activity about our sense of smell and how it compares to sharks' super noses. Learners will create varying solutions of water and perfume.

1 cent - $1 per student Ages 6 - 11 10 to 30 minutes
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In this activity, learners simulate taking HIV antiretroviral drugs by using Tic Tac mints and Kool-Aid packets.

$5 - $10 per group Ages 11 - 18 1 to 4 weeks
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In this activity learners observe mold growth on different types of bread by measuring and recording the growth rate.

$5 - $10 per group Ages 8 - 14 1 to 4 weeks
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In this activity (25th on the page) about learning and memory, learners explore a training method that animal trainers employ called "shaping." Working in pairs, learners will attempt to "shape" each

$1 - $5 per group Ages 8 - 18 10 to 30 minutes
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In this activity, learners construct drums out of everyday containers (like bowls or food containers) and shrink wrap. Learners use a hair dryer to affix and tighten the shrink wrap to the container.

$5 - $10 per student Ages 6 - 11 5 to 10 minutes
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In this activity (p.3-4 of PDF), learners learn about disease transmission and antibiotic resistance.

$1 - $5 per group Ages 8 - 11 10 to 30 minutes
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Just like birds, some dinosaurs had air-filled (pneumatic) bones, which made the dinosaurs' skeletons lighter.

$1 - $5 Ages 8 - 18 1 to 7 days
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In this activity (Page 22 of PDF), learners investigate the evolution of wheat by washing different types of dough with water and comparing the results.

$10 - $20 per group Ages 8 - adult 1 to 2 hours
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In this simulation activity, learners act as parts of the circulatory system and discover how it serves as a transport system for food/nutrients, oxygen, carbon dioxide and waste.

$1 - $5 per group Ages 11 - 14 10 to 30 minutes
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In this construction activity, students use a 2-liter bottle to build a fly trap.

$1 - $5 per student Ages 4 - 14 1 to 7 days
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In some parts of the world, lakes freeze during winter. In this activity learners will explore water’s unique properties of freezing and melting, and how these relate to density and temperature.

$5 - $10 per group Ages 8 - adult 10 to 30 minutes
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In this kinesthetic activity, learners move pom-pom "ions" across a membrane to simulate how an action potential is propagated along an axon.

$5 - $10 per group Ages 11 - 18 45 to 60 minutes
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In this activity, learners build a model of a self-sustaining habitat (growing grass and beans from seeds).

$1 - $5 per group Ages 11 - adult 1 to 7 days
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In this chemistry activity (page 8 of the PDF), learners will identify the instances of physical change, chemical change, and solutions while making homemade soda pop.

$10 - $20 per group Ages 8 - 14 1 to 7 days
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In this activity, learners learn about the adaptations that flowers have developed which support pollination. Learners also list their personal preferences (i.e.

free Ages 8 - 14 30 to 45 minutes
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This is an activity about acid-base reactions using eggs and vinegar. Learners place eggs inside a container of vinegar and leave to soak overnight.

1 cent - $1 per group Ages 11 - 18 10 to 30 minutes