TY  - BOOK
AU  - Yeshurun, Shraga
TI  - The Cognitive Method : a strategy for teaching world problems
SN  - 087353140X
AV  - QA63 .Y47 1979
PY  - 1979///
CY  - Virginia
PB  - NCTM
KW  - Problem solving
KW  - Algebra
KW  - problems, exercises
ER  -