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In this activity, learners will estimate the sizes of balls to learn how to estimate the size of hail. Learners will compare their estimates to the estimates of their peers and the real measurements.

In this math lesson, learners identify the likelihood of an event by using a walk-on probability scale.

In this activity, learners play a game to simulate the food chain.

In this activity, learners create a biosphere in a baggie.

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