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Pirie, Susan E. B.; Kieren, Thomas E. – For the Learning of Mathematics, 1994
Discusses formalizing in mathematics and provides anecdotal illustrations of formalizing in a constructivist environment, using students aged 12 and 8 involved in fraction work. (Contains 19 references.) (MKR)
Descriptors: Cognitive Development, Constructivism (Learning), Elementary Education, Elementary School Students

Pirie, Susan; Kieren, Tom – For the Learning of Mathematics, 1989
Analyzes two transcripts of children's mathematical behavior to observe the nature of recursive levels and interrelationships among them. Describes several levels of the recursions. (YP)
Descriptors: Concept Formation, Elementary Education, Elementary School Mathematics, Fractions