TY  - BOOK
AU  - Van de Walle,John A.
TI  - Elementary and middle school mathematics: teaching developmentally 
SN  - 0801332540
AV  - QA135.5 .V335 2000
PY  - 2000///
CY  - [New York?]
PB  - Addison Wesley Longman
KW  - Mathematics
KW  - Study and teaching (Elementary)
KW  - Study and teaching (Middle school)
N1  - Includes bibliographical references and index
ER  -