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In this activity, learners will simulate the interactions between a predator population of gray wolves and a prey population of deer in a forest.

In this outdoor biology and math activity, learners estimate the size of a population of organisms too numerous to count.

In this simulation, learners model two elephant seal populations and how they change over time. Learners start with cards representing a variety of seals.

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.

In this outdoor game, learners simulate a herd of deer trying to survive in an area called the "home range." Learners explore the concept of "carrying capacity"—what size population of an organism can

In this math lesson, learners apply the concepts of ratio and proportion to the capture-recapture statistical procedure.

In this activity, learners play a game to simulate the food chain.

In this activity (on page 2 of PDF under GPS: Sea Turtles Activity), learners will model how a sea turtle population changes over time, from eggs to adults, using puffed rice.