Case studies in mixed ability teaching / 
edited by A.V. Kelly. 
 - London (etc.) :  Harper and Row,  1975. 
 - (3),207p :  ill., forms ;  22 cm. 
<br/><br/><label>ISBN: </label>0063180448 9780063180444 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education, Secondary--Great Britain.<br/>Nongraded schools--Great Britain.