Mathematics Teacher (1967) Vol. 60, No. 8

  • Mathematics Teacher (1967) Vol. 60, No. 8

    NATIONAL COUNCIL OF TEACHERS OF MATHEMATICS D ECEl\IIBER 1967 \OLl ;\II. !,X, 'l'\IIH.H !i What Has Happened to Probability in the High School? Frederick JI osieller Operational Systems and Checker Games II ans-Georg , leiner The Graphing of Absolute Value Inequalities 'J'homas .l f. Green Some Remarks on Discovery , '