Helping children learn mathematics/ Robert Keys, Mary M. Lindquist, Diana V. Lambdin, Nancy L. Smith.
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TextPublication details: USA: John Wiley & sons, 2009Edition: 9th edDescription: xiv, 443, [29]p.: ill.; 28cmISBN: 9780470403068Subject(s): Mathematics: -- Study and teaching (elementary) | Mathematics: -- Study and teaching (primary)LOC classification: QA 135.5 .R49 2009

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