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In this math lesson, learners learn how to construct stem and leaf plots. Learners first estimate the number of drops of water that will fit on the head of a penny.

1 cent - $1 per group Ages 11 - 14 45 to 60 minutes
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In this activity, learners explore dinosaur fossils and a dig site. Learners work in groups to analyze a dig site map and match bones to a skeletal drawing of Kelsey (a Triceratops).

1 cent - $1 per group Ages 6 - 8 45 to 60 minutes
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In this activity, learners explore how dinosaurs are named and what their names mean. Learners listen to "The Littlest Dinosaurs" by Bernard Most.

1 cent - $1 per group Ages 6 - 8 45 to 60 minutes
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Learners take on the role of environmental engineers as they design water filters.

$5 - $10 per group Ages 11 - 14 45 to 60 minutes
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In this outdoor activity, learners investigate the relationship between the slope of a trail and soil erosion.

$10 - $20 per group Ages 8 - 18 45 to 60 minutes
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In this activity, learners explore how objects can have positive, negative, or neutral charges, which attract, repel and move between objects.

$1 - $5 per group Ages 8 - 14 45 to 60 minutes
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In this activity, learners make slides of onion cells and their own cheek cells. Use this lab to teach learners how to prepare microscope slides and use a microscope.

$5 - $10 per student Ages 8 - 18 45 to 60 minutes
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In this activity, learners get hands-on experience with ratios and scaling while making their own jewelry out of recycled plastic containers.

free Ages 11 - 14 45 to 60 minutes
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In this activity, learners explore the relationship between electric charges and magnetic fields.

$5 - $10 per group Ages 8 - 14 45 to 60 minutes
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In this outdoor biology and math activity, learners estimate the size of a population of organisms too numerous to count.

$10 - $20 per group Ages 8 - 14 45 to 60 minutes
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In this activity, learners play a simple card game to learn the sequence of events in the transmission of nervous system signals.

1 cent - $1 per group Ages 11 - 14 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 outdoor beach activity, learners use a variety of "beaks" (such as trowels, spoons or sticks) to hunt for organisms that shore birds might eat.

$5 - $10 per group Ages 8 - 14 45 to 60 minutes
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In this activity, learners experiment with different variables in making hollandaise sauce to achieve the correct texture and consistency.

$10 - $20 per student Ages 11 - 14 45 to 60 minutes
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In this activity, learners explore sublimation by conducting experiments with dry ice.

$10 - $20 per group Ages 11 - 14 45 to 60 minutes
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In this math lesson, learners explore the concept of using units to measure length. Learners first read "How Big is a Foot" by Rolf Myller and learn about units.

$5 - $10 per group Ages 4 - 6 45 to 60 minutes
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In this activity (page 2 of PDF under GPS: Glaciers Activity), learners will measure the rate at which water streams out of a leaky cup.

$1 - $5 per group Ages 8 - 14 45 to 60 minutes
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In this experiment, learners construct an equilateral triangle using graph paper, a pencil, protractor and ruler. They also make a "laser triangle" using a laser pointer and front-silvered mirrors.

$1 - $5 per group Ages 14 - 18 45 to 60 minutes
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In this activity related to the human circulatory system (on page 10 of the PDF), learners observe the dispersion of a drop of food coloring in water, draw conclusions about the movement of dissolved

1 cent - $1 per group Ages 8 - 14 45 to 60 minutes
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In this activity, learners estimate risks associated with different events and compare their estimates to the real possibilities.

1 cent - $1 per group Ages 11 - 14 45 to 60 minutes