Bahr, Damon L. <br/><br/>
Elementary mathematics is anything but elementary :  content and methods from a developmental perspective / 
Damon L. Bahr, Lisa Ann de Garcia. 
 - Belmont, CA :  Wadsworth Cengage Learning,  2010. 
 - xx, 517 p. :  ill. (some col.) ;  28 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>9780618928170 (pbk.)  RM449.83 0618928170 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics--Study and teaching (Elementary).