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In this activity (located at the top of the page), learners make an easy river strainer and see what they can catch.

In this math lesson, learners construct box-and-whisker plots to analyze and compare data sets. Learners investigate whether or not long-legged people run faster than short-legged people.

In this activity, learners build a sled kite that models a type of airfoil called a parawing.

In this activity (on pages 10-17), learners discover how scientists study biodiversity and the health of the environment based on inspection of small areas—a process known as sampling.