Kelly, A. V. <br/><br/>
Teaching mixed ability classes :  an individualized approach / 
by A. V. Kelly 
 - London :  Harper & Row,  1974 
 - 5, 125 p. :  ill. ;  22 cm. 
<br/><br/> Second ed. published in 1978 under title: Mixed-ability grouping. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0063180243 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ability grouping in education<br/>Individualized instruction<br/>Teaching