TY  - BOOK
AU  - Trafton,Paul R.
AU  - Thiessen,Diane
TI  - Learning through problems: number sense and computational strategies : a resource for primary teachers 
SN  - 032500126X (pbk. : alk. paper)
AV  - QA135.5 .T68 1999
PY  - 1999///
CY  - Portsmouth, NH
PB  - Heinemann
KW  - Mathematics
KW  - Study and teaching (Primary)
N1  - Includes bibliographical references (p. 115-116)
ER  -