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In this activity, learners collect, analyze, and interpret information about objects in order to classify them into a cladogram. Use this activity to talk about how scientists classify things.

In this activity, learners are challenged to design a planktonic organism that will neither float like a cork nor sink like a stone.

In this laboratory exercise, learners will discover how many different plant hosts they can find that are infected by the same genus of a powdery mildew fungus, or how many different genera of powdery

In this web-based activity, learners try to figure out who in an online chat room has their matching puzzle piece.