Messick, Theresa Johnson2016-11-232016-11-231968https://scholarworks.montana.edu/handle/1/10217enPiaget, Jean, 1896-1980ArithmeticMathematical readinessEducation, PrimaryPiaget's stages of development used to evaluate modern mathematical experiencesProfessional PaperCopyright 1968 by Theresa Johnson Messick