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50 Years of ERIC
50 Years of ERIC
The Education Resources Information Center (ERIC) is celebrating its 50th Birthday! First opened on May 15th, 1964 ERIC continues the long tradition of ongoing innovation and enhancement.

Learn more about the history of ERIC here. PDF icon

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The Difficulty of "Length x Width": Is a Square the Unit of Measurement?
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Kamii, Constance; Kysh, Judith – Journal of Mathematical Behavior, 2006
In individual interviews, 220 students in grades 4, 6, 8, and 9 were given one task, and 72 eighth graders were given three tasks to answer two questions: (a) Is a square the unit of measurement for an area for students in grades 4-8? and (b) Does a square have a space-covering characteristic for students in grade 8? The answers to both questions…
Descriptors: Geometric Concepts, Grade 8, Grade 4, Piagetian Theory
Teaching Arithmetic to Low-Performing, Low-SES First Graders
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Kamii, Constance; Rummelsburg, Judith; Kari, Amy – Journal of Mathematical Behavior, 2005
To develop their logico-mathematical foundation of number as described by Piaget (1947/1950, 1967/1971, 1971/1974), 26 low-performing, low-SES first graders were given physical-knowledge activities (e.g., Pick-Up Sticks and "bowling") during the math hour instead of math instruction. During the second half of the school year, when they showed…
Descriptors: Mental Computation, Word Problems (Mathematics), Grade 1, Arithmetic
Equivalent Fractions: Their Difficulty and Educational Implications.
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Kamii, Constance; Clark, Faye B. – Journal of Mathematical Behavior, 1995
Interviews of fifth and sixth graders (n=120) found that they approached a task perceptually instead of reasoning with equivalent fractions, which they had studied in school. (Author/MKR)
Descriptors: Cognitive Style, Elementary Education, Elementary School Students, Fractions