TY  - BOOK
AU  - Tobias,Sigmund
AU  - Duffy,Thomas M
TI  - Constructivist instruction: success or failure? 
SN  - 9780203878842 (ebook : PDF)
PY  - 2009///
CY  - New York
PB  - Routledge
KW  - Constructivism (education)
KW  - Instructional systems
N1  - Includes bibliographical references and index
UR  - http://www.tandfebooks.com/isbn/9780203878842
ER  -