TY  - BOOK
AU  - Clements,Douglas H.
AU  - Sarama,Julie
TI  - Learning and teaching early math: the learning trajectories approach 
T2  - Studies in mathematical thinking and learning
SN  - 9780415995917 (hardback : alk. paper)
PY  - 2009///
CY  - New York
PB  - Routledge
KW  - Mathematics
KW  - Study and teaching (Early childhood)
KW  - Educational psychology
KW  - Child development
KW  - Curriculum planning
UR  - http://www.loc.gov/catdir/toc/ecip0825/2008033304.html
ER  -