Baroody, Arthur J
How an when should place-value concepts and skills be taught?
- 281-286
- 21, No. 4, 1990
Febrero 1991
= JOURNAL FOR RESEARCH IN MATHEMATICS EDUCATION
ARITMETICA CONCEPTOS DEL NUMERO ENSE\197ANZA MATEMATICA MATEMATICAS DE LA ESCUELA ELEMENTAL METODOS DE ENSEÑANZA