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|Dave Skaggs and Kelly Threadgill|
|"The higher the number, the taller the block." The height of these wooden building blocks for each of the integers 1-10 represents their value. Vertically stacking different numbers to identical heights reveals the equivalence of number families; piling them in a different order demonstrates commutativity.|
|Resource Types:||Manipulatives, Educational Vendors|
|Math Topics:||Basic Operations|
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