TY  - BOOK
AU  - SPROAD,TIM
TI  - DISCUSSIONS IN SCIENCE:PROMOTING CONCEPTUAL UNDERSTANDING IN THE MIDDLE SCHOOL YEARS
SN  - 9 781742860343
U1  - 378.17 SPR 
PY  - 2011///
PB  - ACER PRESS
KW  - SCIENCE , TEACHING
ER  -