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Investigate a flower's power of marketing by making an imitation flower that successfully signals a bee (or other pollinator of your choice) to visit.

1 cent - $1 per student Ages 4 - 11 5 to 10 minutes
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In this activity, learners examine how brine shrimp populations can survive in some of the harshest environments.

Over $20 per group Ages 11 - 18 1 to 7 days
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In this activity, learners rotate through several learning and play stations to explore dinosaurs and paleontologists.

$5 - $10 per group Ages 4 - 6 45 to 60 minutes
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Learners construct an electricity-generating wind turbine out of a plastic bottle.

Over $20 per group Ages 11 - 18 2 to 4 hours
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Plants need nutrients to grow. This is why we apply fertilizers to grass and food crops. In this activity, learners will explore how fertilizers can affect lakes and other bodies of water.

$5 - $10 per group Ages 8 - adult 1 to 4 weeks
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In this outdoor activity and bingo-like game, learners explore why and how seeds spread far from the plants that produce them.

$1 - $5 per group Ages 8 - 14 30 to 45 minutes
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In this activity (on pages 36-39), learners make a model of a watershed out of paper, then run water down the mountain to simulate how rainfall and pollution affect watersheds.

$1 - $5 per group Ages 8 - 14 10 to 30 minutes
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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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This activity (on pages 35-43) lets learners analyze a "herd of elk" to detect the spread of a bacterial disease called brucellosis.

1 cent - $1 per group Ages 8 - 14 45 to 60 minutes
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In this activity, learners will estimate the sizes of balls to learn how to estimate the size of hail. Learners will compare their estimates to the estimates of their peers and the real measurements.

$1 - $5 per group Ages 6 - 14 10 to 30 minutes
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This marine biology activity (on pages 11-17) introduces learners to kelp (seaweed) forests that grow in the ocean and are home to many species of sea animals.

$1 - $5 per group Ages 8 - 14 1 to 2 hours
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In this activity (on pages 18-29) learners explore the impact of the March 24, 1989 oil spill in Alaska caused by the Exxon Valdez tanker.

$5 - $10 per group Ages 8 - 14 1 to 2 hours
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This is an activity (located on page 3 of the PDF under Water Clean-up Activity) about the use of reduction agents to decontaminate ground water.

$10 - $20 per group Ages 8 - 14 2 to 4 hours
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In this biology activity (page 3 of the PDF), learners will explore how plants turn sunlight into food through a process called photosynthesis.

$10 - $20 per group Ages 6 - 14 1 to 4 weeks
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In this activity (page 19 of the PDF) learners will create a soda bottle bioreactor by exploring the science of composting, comparing variables such as reactor design, moisture content, and nutrient r

$10 - $20 per student Ages 8 - 14 1 to 12 months
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In this collecting/comparing activity, learners work with samples of sand from different places like a lakefront, river, or ocean beach.

$1 - $5 per group Ages 4 - 14 30 to 45 minutes
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In this drawing/mapping activity, learners design plots of land while incorporating positive strategies for improving water quality.

$5 - $10 per group Ages 11 - 14 1 to 2 hours
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In this activity, learners work in small groups to match various marine animals with their different environments.

free Ages 4 - 8 30 to 45 minutes
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In this fun, hands-on autumn activity, learners experiment to discover whether the colored substances in leaves can be separated from the leaves.

$10 - $20 per group Ages 8 - 14 1 to 2 hours
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In this activity, learners explore the human influences on the carbon cycle and examine how fossil fuels release carbon.

$1 - $5 per group Ages 8 - 14 45 to 60 minutes