Hattie, John A. C.  <br/><br/>
Visible learning   : a synthesis of over 800 meta- analyses  relation to achievement  
John A. C.  Hattie 
 - London:  Routledge,  2009. 
 - 378p. 
<br/><br/><label>ISBN: </label>978041547188 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Learning - Longitudinal studies  <br/>Teaching - Longitudinal studies  <br/>Effective teaching - Longitudinal studies 
<br/><br/><label>Dewey Class. No.: </label>370.1523  / HAV