Case studies in mixed ability teaching / 
edited by A. V. Kelly 
 - London :  Harper & Row,  1975 
 - iii, 207 p. :  ill. ;  22 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>0063180448 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ability grouping in education--Case studies