Sobel, Max A. <br/><br/>
Teaching mathematics:   a sourcebook of aids, activities and strategies. 

 - 3rd edition 
 - XI, 288 p. (pb)  23cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>0-205-29256-9 
<br/><br/><label>Dewey Class. No.: </label>510.712 So12 2000