TY  - BOOK
AU  - Kilpatrick,Jeremy
AU  - Swafford,Jane
ED  - National Research Council (U.S.).
TI  - Helping children learn mathematics
SN  - 0309084318 (pbk.)
AV  - QA13 .H45 2002
PY  - 2002///
CY  - Washington, DC
PB  - National Academy Press
KW  - Mathematics
KW  - Study and teaching
KW  - United States
N1  - Includes bibliographical references (p. 40-41)
ER  -