Mathematics Teacher (1987) Vol. 80, No. 1

  • Mathematics Teacher (1987) Vol. 80, No. 1

    THEMATI CS TEACHER VOLUME 80 NUMBER 1 J ANUARY 1987 I I 111-IIIIIII~II~OOIOOII~-~11111118 • I 1111mnu I ! I NATIONAL COUNCIL OF TEACHERS OF MATHEMATICS Puzzle Primes Perpendiculars Merrill ... we make Outstanding programs for grades 7 through 12 • Careful development of concepts and skills • Plentiful practice and revi