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Cardiac Hill
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In this outdoor activity linking human health to the environment, learners use their pulse rates as a measure of the effort expended in walking on different slopes.

Sawing Away
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In this outdoor activity, learners saw sections from fallen trees, then count tree rings and look closely at patterns of tree growth.

Launch Altitude Tracker
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In this activity, learners construct hand-held altitude trackers. The device is a sighting tube with a marked water level that permits measurement of the inclination of the tube.

Damsels and Dragons
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In this outdoor activity/field trip, learners conduct experiments to explore where dragonflies and damselflies perch or rest, and how the flies change behavior in reaction to other flies or fly decoys

Do Your Own Dig
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In this outdoor archaeology activity, learners use mathematical skills and scientific inquiry to generate and process information from their own excavation site.

Pollution Patrol
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In this activity, learners explore how engineers design devices that can detect the presence of pollutants in the air.

Clam Hooping
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In this two-part outdoor activity, learners conduct a population census of squirting clams on a beach or mudflat, and investigate the clams' natural history.

Great Steamboat Race
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In this outdoor activity, learners race small boats, made of cork, balsa wood, popsicle sticks etc., to investigate the rate and direction of currents in a stream or creek.

Hold a Hill
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In this outdoor activity, learners investigate the relationship between the slope of a trail and soil erosion.

Feeding Facilitation: A Lesson in Evolution and Sociobiology
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This is an outdoor activity designed to demonstrate evolution of feeding behavior in flocking, schooling or herding animals that maximizes allocation of food resources and enhances survival.

Terrestrial Hi-Lo Hunt
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In this outdoor activity, learners search for the warmest and coolest, windiest and calmest, wettest and driest, and brightest and darkest spots in an area.

Give or Take?
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In this outdoor activity, learners work in pairs using their senses—especially touch—to learn more about individual trees.

Wintergreen
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In this outdoor, winter activity, learners find living green plants under the snow and determine the light and temperature conditions around the plants.

Rock Pioneers
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In this outdoor activity/field trip, learners investigate organisms that live along the ocean's rocky coast.

Seas in Motion
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In this outdoor, beach activity, learners use tennis balls, water balloons and other simple devices to investigate the movement of waves and currents off a sandy beach.

Determining the Amount of Transpiration from a Schoolyard Tree
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In this activity, learners calculate the number of milliliters of water a nearby tree transpires per day.

Cool It
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In this outdoor activity/game, learners use thermometers to simulate how lizards survive in habitats with extreme temperatures.

Trail Construction
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In this highly physical outdoor activity, learners construct and compare experimental trail sections to select the best trail-construction technique for their site.

Playground Patterns of Cracks
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In this math activity, learners observe and sketch cracking patterns in pavement.

Exercise in Creating Drawings for Field Notebooks
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Learners draw and describe a leaf, and then re-find leaves drawn and described by other learners. Learners can observe leaves outside, or leaves may be brought into the classroom.