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In this nutrition and estimation activity (page 12 of PDF), learners estimate serving sizes of different foods and compare their estimates to serving size information provided on nutrition food labels

In this activity, young learners use different-sized paper 'caterpillars' and various household items to predict and measure their height.

In this activity, learners take measurements and create charts to learn about the size of dinosaurs and their relative scale to humans.

In this nutrition activity (page 16 of PDF), learners document their individual eating habits and learn whether their eating patterns meet their needs.

This activity puts a mathematical twist on the familiar “guessing jar.” No guesses allowed, estimates only.

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

In this activity, learners investigate visual perception as well as plan and conduct their own experiments.