Arithmetic Teacher (1972) Vol. 19, No. 8

  • Arithmetic Teacher (1972) Vol. 19, No. 8

    An official journal of THE NATIONAL COUNCIL OF TEACHERS OF MATHEMATICS DECEMBER 1972 1.....--~ Volume 19, Number 8 Method or justification? W. G. Quast The fourth operation is not fundamental Marilyn 1. Zweng Team learning Carolyn Y oung Models and mathematics Elizabeth H. Fennema THE ARITHMETIC TEACHER is an official