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This activity (on pages 35-43) lets learners analyze a "herd of elk" to detect the spread of a bacterial disease called brucellosis.

Learners use a variety of beans to represent a variety of species, and scatter these beans over a large piece of paper representing the environment.

This activity investigates how bark beetles can threaten forests by having learners estimate the number of infected trees from a photo.

After an interest-generating discussion about "dirt" and microbes, learners select and collect soil samples from a variety of locations (schoolyard, home, etc.).

In this lesson, learners will practice graphing and statistically analyzing data.

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