TY  - BOOK
AU  - Van de Walle,John A.
AU  - Karp,Karen
AU  - Bay-Williams,Jennifer M.
AU  - Wray,Jonathan
TI  - Elementary and middle school mathematics: teaching developmentally 
SN  - 9780132879040
PY  - 2013///
CY  - Boston
PB  - Pearson
KW  - Mathematics
KW  - Study and teaching (elementary)
KW  - Study and teaching (middle school)
N1  - Includes references and index
ER  -