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In this simulation of natural selection, learners use binder clips in three different sizes to represent the diversity of beak sizes in a bird population.

$5 - $10 per group Ages 11 - 18 45 to 60 minutes
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In this activity related to Archimedes' Principle, learners use water displacement to compare the volume of an expanded gummy bear with a gummy bear in its original condition.

$1 - $5 per group Ages 11 - 18 1 to 7 days
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In this lab exercise, learners explore diffusion, cell membranes and particle size using beets and three alcohols.

$10 - $20 per group Ages 14 - 18 10 to 30 minutes
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In this activity, learners calculate the width (horizontal diameter) of the blind spot on their retina. Learners make a blind spot tester using a piece of notebook paper.

1 cent - $1 per student Ages 11 - 18 5 to 10 minutes
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This activity was designed for blind learners, but all types of learners can utilize it to investigate volume, mass, and density.

$5 - $10 per group Ages 8 - 18 10 to 30 minutes
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Get all wrapped up in a lesson about skin!

$1 - $5 per group Ages 11 - 18 45 to 60 minutes
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In this activity, learners use a straight line to learn about circles. Learners measure and record the diameter and circumference of different sized cylindrical objects on a chart.

$1 - $5 per group Ages 11 - 18 30 to 45 minutes
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In this activity, learners discover the importance of maps and scale as they work together to create a map of the classroom.

free Ages 11 - 18 45 to 60 minutes
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In this hands-on and feet-on excursion, learners take a science walk to visualize the planet's immense size and numerous structures, without the usual scale and ratio dimensions found in most textbook

1 cent - $1 per group Ages 11 - 18 45 to 60 minutes
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This investigation provides learners with a hands-on activity that simulates the changing relationship of surface areas-to-volume for a growing cell.

$1 - $5 per group Ages 14 - 18 45 to 60 minutes
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In this activity, learners explore Charles' Law in a syringe.

1 cent - $1 per group Ages 14 - 18 1 to 2 hours
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Learners explore the relationship between energy consumption, population, and carbon emissions in the countries of the Americas.

$1 - $5 per group Ages 14 - 18 45 to 60 minutes
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In this classic hands-on activity, learners estimate the length of a molecule by floating a fatty acid (oleic acid) on water.

$1 - $5 per student Ages 11 - 18 45 to 60 minutes
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In this activity, learners will investigate how shorebirds and seabirds are extremely vulnerable to changes in their environment, whether human-induced or otherwise.

free Ages 14 - 18 1 to 2 hours
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In this activity, learners will explore how the human brain interprets environmental stimuli.

$1 - $5 per group Ages 14 - 18 45 to 60 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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In this activity, learners explore the great pump in their chests--the human heart!

$1 - $5 per group Ages 8 - 18 30 to 45 minutes
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In this space science activity, learners explore transits and the conditions when a transit may be seen.

$1 - $5 per group Ages 11 - 18 45 to 60 minutes
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In this activity, learners investigate visual perception as well as plan and conduct their own experiments.

1 cent - $1 per group Ages 8 - 18 1 to 2 hours
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In this activity, learners investigate the touch sensory system and discover how to plan and carry out their own experiments.

$5 - $10 per group Ages 8 - 18 1 to 2 hours