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This is an activity (located on page 4 of the PDF under What's Nano? Activity) about size and scale.

In this math lesson, learners make estimates to analyze the number of apples per acre, and visualize the magnitude of one million.

In this activity (on pages 16-21), learners get a sense of geological time by understanding how big a million is.

In this math lesson, learners apply measurement skills to determine, in dollar bills, the capacity of a suitcase.