Hattie, John <br/><br/>
Visible learning :  a synthesis of meta-analyses relating to achievement / 
John A. C. Hattie 
 - London :  Routledge,  2009 
 - ix, 378 p. :  ill. ;  25 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9780415476188 (pbk.) :  RM132.45 9780415476171 (hbk.) 0415476186 (pbk.) 0415476178 (hbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Learning--Longitudinal studies<br/>Teaching--Longitudinal studies<br/>Effective teaching--Longitudinal studies<br/>Teacher effectiveness--Longitudinal studies