Martin, David Jerner, <br/><br/>
Elementary science methods :  a constructivist approach / 
David Jerner Martin. 
 - Second edition. 
 - xx, 556 pages :  illustrations ;  26 cm. 
<br/><br/> Photocopy material. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0534556302  Hadiah 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science--Study and teaching (ELementary)--United States.<br/>Constructivism.