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ERIC Number: ED389558
Record Type: RIE
Publication Date: 1995-Oct
Pages: 8
Abstractor: N/A
Reference Count: N/A
ISBN: N/A
ISSN: N/A
Why Is the Use of a Ruler So Hard?
Kamii, Constance
This study involved 3 days of teaching in two fourth-grade classes. A pretest and a posttest were given consisting of (1) a NAEP item asking for the length of a line drawn next to a ruler, (2) a Piagetian unit-iteration task, and (3) the measurement of an object with a ruler that had the "0" mark away from its edge. It was found in the pretest that 86% of the children had constructed the logic of unit iteration but that most of them could not use a ruler correctly. The posttest revealed that, although there was progress, the problems found in the pretest persisted among a third to a fourth of the children. These problems were all related to the initial unit of measurement. (Author)
Publication Type: Reports - Research; Speeches/Meeting Papers
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers: Rulers (Instruments)
Note: Paper presented at the Annual Meeting of the North American Chapter of the International Group for the Psychology of Mathematics Education (17th, Columbus, OH, October 21-24, 1995). For entire conference proceedings, see SE 057 177.