Sobel, Max A. <br/><br/>
Teaching mathematics :  a sourcebook of aids, activities, and strategies / 
by Max A.Sobel and Evan M. Maletsky 
 - Englewood Cliffs, N.J. :  Prentice-Hall,  1974 
 - xii, 240 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographies. 
<br/><br/><label>ISBN: </label>0138941394 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics--Study and teaching (Secondary)