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

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, learners will decide together on a question about how far, long or high the group could reach together.

In this activity, learners sample a star field to estimate the number of stars in the universe.

In this coin math activity, learners sort and stack 100 (one hundred) pennies into piles of 5 pennies each, 10 pennies each, and 20 pennies each.

Build time sense into the schedule by asking learners to predict what can happen in a certain amount of time: We have 20 minutes before outdoor time. What can you get done?