Helping children learn mathematics/
Reys, Robert. 2009
Helping children learn mathematics/ Robert Keys, Mary M. Lindquist, Diana V. Lambdin, Nancy L. Smith. - 9th ed. - USA: John Wiley & sons, 2009. - xiv, 443, [29]p.: ill.; 28cm.
Includes index.
9780470403068
Mathematics:--Study and teaching (elementary)/
Mathematics:--Study and teaching (primary)/
QA 135.5 .R49 2009
Helping children learn mathematics/ Robert Keys, Mary M. Lindquist, Diana V. Lambdin, Nancy L. Smith. - 9th ed. - USA: John Wiley & sons, 2009. - xiv, 443, [29]p.: ill.; 28cm.
Includes index.
9780470403068
Mathematics:--Study and teaching (elementary)/
Mathematics:--Study and teaching (primary)/
QA 135.5 .R49 2009