Ball, Deborah Leowenberg

With an eye on the mathematical horizon : dilemmas of teaching elementary school methematics - 374-397 - 93, No. 4, 1993

Agosto 1993 = THE ELEMENTARY SCHOOL JOURNAL

EDUCACION MATEMATICA ENSE\197ANZA MATEMATICA ESTUDIANTES DE LA ESCUELA ELEMENTAL GRADO 4 METODOS DE ENSEÑANZA