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ERIC Number: EJ802702
Record Type: Journal
Publication Date: 2008
Pages: 5
Abstractor: ERIC
Reference Count: 4
ISBN: N/A
ISSN: ISSN-1326-0286
Ratio Tables to Promote Proportional Reasonings in the Primary Classroom
Dole, Shelley
Australian Primary Mathematics Classroom, v13 n2 p18-22 2008
There are many classroom activities that can be implemented with primary students that introduce and immerse them in ratio investigations. Some enjoyable tasks include finding the ratio of tongue rollers to non-tongue rollers in the classroom; left-hand dominant to right-hand dominant; right-thumb over left-thumb when clasping the hands to left-thumb over right-thumb, and so on. Children also enjoy looking at body ratios and finding that their foot is the same length as the distance from their wrist to their elbow; that their wrist circumference is half their neck circumference, which is half their head circumference (or near enough), or that their height is almost the same length as their arm-span. However, extending from these investigations to develop understanding of the multiplicative relationship between quantities in a ratio is often difficult as this requires proportional reasoning. The development of proportional reasoning is a gradual process, underpinned by increasingly sophisticated multiplicative thinking and the ability to compare two quantities in relative (multiplicative) rather than absolute (additive) terms. Proportional reasoning as part of the multiplicative field has been identified as a key concept underlying a wide range of topics studied at the middle school level. In this article, the author describes ratio tables and demonstrates how they can be used to support the development of proportional reasoning. (Contains 4 figures.)
Australian Association of Mathematics Teachers (AAMT). GPO Box 1729, Adelaide 5001, South Australia. Tel: +61-8-8363-0288; Fax: +61-8-8362-9288; e-mail: office@aamt.edu.au; Web site: http://www.aamt.edu.au
Publication Type: Journal Articles; Reports - Descriptive
Education Level: Elementary Education
Audience: Teachers
Language: English