Sund, Robert B. <br/><br/>
Student -centered teaching in the secondary school / 
Robert B. Sund and Leslie W. Trowbridge. 
 - Columbus, Ohio :  Merrill,  1974. 
 - vi, 384 p. :  illus. ;  24 cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/> Open access. 
<br/><br/><label>ISBN: </label>0675088461 
<br/><br/><label>Subjects--Topical Terms: </label><br/>High school teaching.