00760cam a2200229 a 450000100090000000300040000900500170001300800410003001000170007102000150008804000180010305000230012108200180014410000260016224500980018825000120028626000390029830000410033750400510037865000490042965000520047813026520OSt20170121084849.0021210s2004    maua     b    001 0 eng    a  2002043767  a020538689X  aDLCcDLCdDLC00aQA135.6b.V36 200400a510/.71/22211 aVan de Walle, John A.10aElementary and middle school mathematics :bteaching developmentally /cJohn A. Van de Walle.  a5th ed.  aBoston :bAllyn and Bacon,cc2004.  axxvii, 468 p. :bcol. ill. ;c28 cm.  aIncludes bibliographical references and index. 0aMathematicsxStudy and teaching (Elementary) 0aMathematicsxStudy and teaching (Middle school)