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1Published 1985“...National Council of Teachers of Mathematics,...”
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2Published 1970“...National Council of Teachers of Mathematics,...”
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3
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4Published 1994“...National Council of Teachers of Mathematics,...”
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5
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6Published 2012“...National Council of Teachers of Mathematics,...”
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7“...ASCD ; National Council of Teachers of Mathematics,...”
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8Published 1908“...National Council of Teachers of Mathematics....”
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9“...Corwin Press : National Council of Teachers of Mathematics,...”
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