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In this activity (p.5-6 of PDF), learners investigate natural selection. Learners discover that natural selection, which takes place over decades, can lead to altered populations within a species.

$5 - $10 per group Ages 8 - 11 10 to 30 minutes
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In this math lesson, learners follow step-by-step directions for making tangram pieces out of folded and torn paper. First, learners read "Grandfather Tang's Story" by Ann Tompert.

1 cent - $1 per student Ages 8 - 11 10 to 30 minutes
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In this activity, learners measure the diameter of their water balloons, model an impact, measure the diameter of the “crater” area, and determine the ratio of impactor to crater.

$1 - $5 per group Ages 8 - 14 10 to 30 minutes
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In this activity, learners use multiplication skills to get groups of aliens safely back to their planet.

$1 - $5 per group Ages 8 - 11 10 to 30 minutes
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In this geometry activity, learners explore networks painted on playgrounds, such as a four square court, and draw their own.

1 cent - $1 per group Ages 8 - 11 10 to 30 minutes
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In this activity, learners watch a video to learn about a couple who built a home out of shipping containers in Brooklyn, New York.

1 cent - $1 per student Ages 11 - 18 10 to 30 minutes
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This simple activity uses paper and scissors to convey two key concepts to learners: the nanoscale is very small and working on the nanoscale requires special tools.

1 cent - $1 per student Ages 6 - adult 10 to 30 minutes
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In this geology activity (page 6 of the PDF), learners explore how carbonic acid can slowly dissolve limestone and form caves.

$1 - $5 per group Ages 11 - 14 10 to 30 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
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Learners will construct a model of a heart valve using a film canister, a piece of masking tape, and a piece of paper.

1 cent - $1 per group Ages 4 - adult 10 to 30 minutes
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Learners will explore the chemistry of mucous and its importance to our health by following a process to make their own replica "snot." The activity includes a time and age recommendation, a materials

$1 - $5 per group Ages 6 - adult 10 to 30 minutes
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In this activity, learners explore different ways to stack cups to meet a personal goal.

$1 - $5 per group Ages 4 - 14 10 to 30 minutes
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In this activity, learners experiment with hydrogen peroxide, vinegar, yeast, and baking soda to produce hot and cold reactions. Use this activity to demonstrate exothermic and endothermic reactions.

$5 - $10 per student Ages 8 - 18 10 to 30 minutes
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This game teaches ratio and proportion by having learners make "salads" that combine three types of beans in different combinations.

1 cent - $1 per student Ages 8 - 14 10 to 30 minutes
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In this meteorology activity, learners build weather vanes using straws, paperclips, and cardstock.

$1 - $5 per student Ages 6 - 14 10 to 30 minutes
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In this online interactive simulation, learners will test the pH of liquids like coffee, spit, and soap to determine whether each is acidic, basic, or neutral.

free Ages 11 - adult 10 to 30 minutes
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In this activity, learners help create and then navigate an outdoor course of the traditional "planets" (including dwarf planet Pluto), which are represented by small common objects.

$10 - $20 per group Ages 8 - 14 10 to 30 minutes
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In this activity, learners will create a home for animal friends in their backyard using recycled materials. Some material suggestions include: pine straw and twigs.

1 cent - $1 per student Ages 4 - adult 10 to 30 minutes
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In this activity, groups of four learners must complete a set of four manual tasks. The restrictions are that they must complete the tasks in a limited time while wearing garden or rubber gloves.

Over $20 per group Ages 8 - 14 10 to 30 minutes
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This is a quick activity (on page 2 of the PDF under Hockey Sticks Activity) about how the arrangement of carbon atoms determines carbon's different properties.

1 cent - $1 per group Ages 8 - 14 10 to 30 minutes