Kennedy, Leonard M. Guiding children's learning of mathematics. - 11th ed. / Leonard M. Kennedy, Steve Tipps, Art Johnson. - Belmont, CA : Thomson/Wadsworth, c2008. - xxii, 589 p. : col. ill. ; 28 cm. Includes bibliographical references (p. 571-576) and index. ISBN: 9780495091912 049509191X LCCN: 2006939472 Subjects--Topical Terms: Mathematics--Study and teaching (Elementary) LC Class. No.: QA135.6 / .K46 2008 Dewey Class. No.: 372.7