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Use your hand span to measure the distance around a tree trunk. If you ask a friend to try the same thing, how do the answers compare?

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Measure for Measure

This article, written for students, looks at how some measuring units and devices were developed.

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Sizing Them Up

Can you put these shapes in order of size? Start with the smallest.

Sizewise

Stage: 1 Challenge Level: Challenge Level:1

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