A set of rulers that use different sized, informal units to measure length.
The rulers come in units of various sizes which helps develop an understanding that in order to compare objects, the unit of measurement must be the same size.
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Common Core Curriculum alignment
Describe measurable attributes of objects, such as length or weight. Describe several measurable attributes of a single object.
Express the length of an object as a whole number of length units, by laying multiple copies of a shorter object (the length unit) end to end; understand that the length measurement of an object is the number of same-size length units that span it wi...
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