Mathematics Teacher (1979) Vol. 72, No. 9

  • Mathematics Teacher (1979) Vol. 72, No. 9

    AN OFFICIAL JOURNAL OF THE NATIONAL COUNCIL OF TEACHERS OF MATHEMATICS The Mathematics Teacher is devoted to the improvement of mathematics instruction in the junior high schools, senior high schools, two-year colleges, and teacher-education colleges. E DPRESS Member of the Educational Press Association of America Tbe