Today's Mathematics:
Heddens, James W.
Today's Mathematics: concepts and methods in elementary school mathematics/ James W. Heddens and William R. Speer - 7th ed. - New York: Macmillan Publishing Company, 1992 - xi, 656p. : ill. ; cm
Includes bibliographical references and index.
0023529334
Mathematics.--Study and teaching (Elementary).
QA 135.5 .H42 1992
Today's Mathematics: concepts and methods in elementary school mathematics/ James W. Heddens and William R. Speer - 7th ed. - New York: Macmillan Publishing Company, 1992 - xi, 656p. : ill. ; cm
Includes bibliographical references and index.
0023529334
Mathematics.--Study and teaching (Elementary).
QA 135.5 .H42 1992