New directions for elementary school mathematics/ 
Paul R. Trafton, 1989 yearbook editor. 
 - Reston, Va.:  National Council of Teachers of Mathematics,  1989. 
 - viii, 245 p.:  ill.;  24 cm. 
 - Yearbook / National Council of Teachers of Mathematics,;  1989  0077-4103; .
 - Yearbook (National Council of Teachers of Mathematics);  1989. .
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0873532724 
<br/><br/><label>LCCN: </label>91106394 //r932 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics---Study and teaching (Elementary)
<br/><br/><label>Dewey Class. No.: </label>510.7