Mathematics in the Elementary Schools of the United States. International Commission on the Teaching of Mathematics: The American Report, Committees I and II.
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1912 ◽
Vol 12
(3)
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pp. 213-224
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1911 ◽
Vol 11
(3)
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pp. 225-241
2012 ◽
Vol 112
(6)
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pp. 921-926
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Keyword(s):