Morton, R. L. <br/><br/>
Teaching arithmetic /  
R. L. Morton. 
 - 1st ed. 
 - Washington, D. C. :    National Education Association,    1953. 
 - 33 p. :    ill. ;    22 cm. 
 - What Research says to the Teacher ;    2 .
<br/><br/>Includes bibliographical references (p. 32-33). 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Arithmetic -- Study and teaching.
<br/><br/><label>Dewey Class. No.: </label>372.7