01057cam a2200325 a 4500 ocm62331079 OCoLC 20090522060442.0 051114s2007 maua b 001 0 eng 2005057485 69981958 0205483925 9780205483921 0205493963 (pbk.) 9780205493968 (pbk.) YDXCP 2395921 NZ1 10571764 AU@ 000040021968 (OCoLC)62331079 (OCoLC)69981958 QA135.6 .V36 2007 510.71/2 22 Van de Walle, John A. Elementary and middle school mathematics : teaching developmentally / John A. Van de Walle. 6th ed. Boston : Pearson /Allyn and Bacon, c2007. xxvi, 509, [28] p. : ill. (chiefly col.) ; 28 cm. Includes bibliographical references and index. Mathematics Study and teaching (Elementary) Mathematics Study and teaching (Middle school) 1000 1000