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

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

In this activity, learners investigate the food, water, and space needs of common livestock animals.

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

In this activity, learners examine the culture and history of the tomb site.