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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.

In this activity (on pages 22-24 of the PDF), learners match extreme enviroments with life forms they support.

In this activity, learners grow germs collected from their hands and other objects. They cultivate the germs on a growth medium (such as slices of grapefruit or processed cheese) for a week.

Working in small groups, learners receive a written scenario regarding a bacterium with a certain goal it must carry out.

In this activity related to microbes, learners create scale models of microorganisms and compare relative sizes of common bacteria, viruses, fungi and protozoa using metric measures: meters, centimete

In this activity, learners use sets of cards to assign microorganisms to different groups.