TY  - BOOK
AU  - Van de Walle,John A.
AU  - Karp,Karen S.
AU  - Bay-Williams,Jennifer M.
TI  - Elementary and middle school mathematics: teaching developmentally 
SN  - 9780205573523
U1  - 510.71 Abridged edition 15
PY  - 2010///
CY  - Boston
PB  - Allyn & Bacon
KW  - Mathematics
KW  - Study and teaching (Elementary)
KW  - Study and teaching (Middle school)
ER  -