Van de Walle, John A. <br/><br/>
Elementary and middle school mathematics teaching developmentally/ John A. Van de Walle, Karen S. Karp, Jennifer M. Bay-William. 

 - 7th ed. 
 - Boston : Pearson/Allyn and Bacon Publishers, 2010. 
 - xxix, 490 p. : ill. ; 27 cm. 
<br/><br/><label>ISBN: </label>9780205690053 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics --Study and teaching (Elementary) Mathematics --Study and teaching (Middle school)
<br/><br/><label>Dewey Class. No.: </label>510.712 VAN