TY  - GEN
AU  - Van de Walle John A
TI  - Elementary and middle school mathematics: teaching developmentally 
SN  - 020538689X
AV  - QA135.6 
U1  - 510/.71/2 
PY  - 2004///
CY  - Boston
PB  - Allyn and Bacon
KW  - Mathematics
KW  - Study and teaching Elementary
KW  - Study and teaching Middle school
N1  - Includes bibliographical references and index
ER  -