Teaching number : advancing children's skills and strategies 
Robert J. Wright ... [et al.]. 
 -  Paul Chapman Pub.,  2002 
 - xiv, 242 p. 
<br/><br/>
<br/><br/><label>ISBN: </label>0-7619-7050-9 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Arithmetic -- Study and teaching.
<br/><br/><label>Dewey Class. No.: </label>510.371 W93t 2002