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In this activity (on page 2 of the PDF under GPS: Cactus Activity), learners will develop their own version of a tool used by biologists, a dichotomous key, by collecting all their left shoes.

In this outdoor activity and fun race, learners first find the most common type of tree in a forest site.

In this activity, learners calculate the number of milliliters of water a nearby tree transpires per day.

In this very hands-on lesson, learners will investigate dendrochronology (the study of tree rings to answer ecological questions about the recent past) and come up with conclusions as to what possible

In this outdoor activity, learners cut through and investigate rotten logs and then make log-profile puzzles for each other.