Williams, G. Arnell <br/><br/>
How math works:  a guide to grade school arithmetic for parents and teachers / 
G. Arnell Williams 
 - Maryland:  Rowman & Littlefield Publishers,  c2013. 
 - xix, 325p.;  ill. 
<br/><br/>Includes bibliographies and index  
<br/><br/><label>ISBN: </label>978-1-4422-1874-1 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Arithmetic - Study and teaching (Elementary)
<br/><br/><label>Dewey Class. No.: </label>G.S. 372.7 W723 2013