Mathematics Teacher (1988) Vol. 81, No. 6

  • Mathematics Teacher (1988) Vol. 81, No. 6

    HEMATI CS TEACHER VOLUME 81 NUMBER 6 SEPTEMBER 1988 NATIONAL COUNCIL OF TEACHERS OF MATHEMATICS Variable Problem Solving Number Sense You could say the same thing about mathematics textboooks And you would be right. Because mathematics textbooks have to change constantly to stay "up to speed." Merrill mathematics textb