TY  - BOOK
AU  - Van de Walle, John A.
TI  - Teaching student-centered mathematics: grade 5-8 
SN  - 0-205-41797-3
U1  - 372.2 V28 
PY  - 2006///
CY  - USA
PB  - Pearson Education, Inc.
N1  - CoED; Bachelor of Elementary Education
ER  -