TY  - BOOK
AU  - Krajcik,Joseph S.
AU  - Czerniak,Charlene Lochbihler
TI  - Teaching science in elementary and middle school : a project-based approach 
SN  - 0-8058-6206-4
U1  - 372.35 23rd.
PY  - 2007///
CY  - New York
PB  - Routledge
KW  - Science-Study and teaching (Elementary)-Methodology
KW  - Science-Study and teaching (Middle school)-Methodology
N1  - Library has 4th ed also
UR  - www.routledge.com
ER  -