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  - 1292331399
U1  - 510.71 Abridged edition 15
PY  - 2020///
CY  - Harlow, England
PB  - Pearson
KW  - Mathematics
KW  - Study and teaching
ER  -