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Abuse-a-Cyst
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In this activity, learners examine how brine shrimp populations can survive in some of the harshest environments.

Rumination
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In this activity (on pages 24-34), learners explore the four-part stomach of cows (and other grazing animals called ruminants), and compare it to the human one-part stomach and its digestive process.

Who Goes There?
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In this outdoor, night activity, learners track nocturnal animals' footprints, droppings and other signs of their presence.

Pesticides and Eggshell Thinning
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This lab activity is about toxic substances like pesticides and their effects on biological systems. The activity starts with an introduction of how birds sequester calcium to make an egg.

Transformation of E. coli Using Green Fluorescent Protein
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In this activity related to plant biotechnology, learners transform a strain of E. coli using green fluorescent protein from a bioluminescent jellies.
Hexagon Hunt
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This activity gets learners looking at 6-sided shapes in nature, including the cells of a beehive, as well as other shapes.

Mussel Your Way Through Photosynthesis
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Using zebra mussels (Dreissena polymorpha), elodea and an indicator dye, learners study the role of light in photosynthesis.

Mermaid's Purse
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In this activity (page 2 of pdf), learners craft a model of a skate egg case and come to understand that cartilaginous fish such as sharks and shakes employ reproductive strategies that differ from th

Living Clocks
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In this activity about daily rhythms (on page 17 of the PDF), learners will explore circadian patterns in humans, animals and plants.

Using a Sundial
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In this activity (on page 12 of the PDF), learners make a sundial (shadow clock) appropriate for their geographic location in the northern hemisphere and use it to tell time.

When Pigs Fly
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In this math lesson, learners explore probability.

Gummy Growth
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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.

Make Your Own Ant Farm
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In this outdoor/indoor activity, learners collect ants and dirt to create an ant farm in a cup that they can observe over time.

Free-living and Plant-Parasitic Nematodes (Roundworms)
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This lesson introduces learners to the world of nematodes (roundworms).

Bird Watch
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In this group or individual activity, learners are encouraged to watch birds near home or school—possibly where birds are nesting in a tree, pecking in a park, feeding from a feeder, or flying through

Sea Turtle First Aid Investigation
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This activity (located on page 4 of the PDF under GPS: Sea Turtles Activity) is a full inquiry investigation into testing a repair material.

Air-filled (Pneumatic) Bone Experiments
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Just like birds, some dinosaurs had air-filled (pneumatic) bones, which made the dinosaurs' skeletons lighter.

An Interdisciplinary Deer and Human Population Study
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This activity helps the learner answer the question: "What environmental problems arise due to animal and human overpopulation and what might need to be done to combat these problems?" Learners play a

Paper Mache Dinosaurs
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In this activity (located on page 6 of PDF), learners observe and reproduce the distinctive physical features (i.e. plates, sharp spikes, long necks, deep jaws, claws) of their favorite dinosaurs.

Saguaro Nest Cavities
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This activity (on page 3 of the PDF under GPS: Cactus Activity) is a full inquiry investigation into how some desert birds keep their cool.