Learning mathematics in elementary and middle schools / 
W. George Cathcart...[at al.]. 
 - 4th ed. 
 - Toronto:  Prentice Hall,  2004. 
 - xii, 170 p.:  ill.; 
<br/><br/> Includes bibliographical reference and index 
<br/><br/><label>ISBN: </label>0131397141 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics
<br/><br/><label>LC Class. No.: </label>QA11.2  .C38  2004