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DMT Insights
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DMT Insights
DMT Insight 18: Why Measurement Matters: The Building Blocks of Math
This DMT Insight explains how measurement gives numbers meaning: students compare attributes, iterate equal-sized units, and coordinate unit size with unit count. That same structure extends to rulers, number lines, fractions, decimals, and place val
Measurement
Measurement (3-5)
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DMT Insights
Teaching Area and Perimeter
This DMT Insight explains why students persistently confuse area and perimeter and shows how intentionally teaching dimensions, units, and tools leads to lasting understanding.
Geometry / Measurement / Data (3-5)
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