TY  - BOOK
AU  - Thompson, Patrick W.
TI  - Notations, conventions, and constraints : contributions to effective uses of concrete materials in elementary mathematics
KW  - DESARROLLO COGNOSCITIVO
KW  - EAC
KW  - ENSE\197ANZA MATEMATICA
KW  - FRACCIONES DECIMALES
KW  - MATERIALES MANIPULABLES
KW  - NUMEROS ENTEROS
N1  - Junio 1992
ER  -