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http://dx.doi.org/10.7468/mathedu.2020.59.3.255

A discussion from a multi-dimensional curriculum perspective on how to instruct the computational estimation of addition and subtraction  

Do, Joowon (Seoul Banghyun Elementary School)
Paik, Suckyoon (Seoul National University of Education)
Publication Information
The Mathematical Education / v.59, no.3, 2020 , pp. 255-269 More about this Journal
Abstract
In this study, how to instruct the computational estimation of addition and subtraction was considered from the perspective of a 'intended-written-implemented' multi-dimensional curriculum. To this end, the 2015 revised elementary school mathematics curriculum as a intended curriculum and the 2015 revised first~sixth grade textbook as a written curriculum were analyzed with respect to how to instruct the computational estimation of addition and subtraction. As an implemented curriculum, a research study was conducted in relation to the method of instructing teachers about the computational estimation of addition and subtraction. As a result, first, it is necessary to discuss how to develop the ability to estimate and set it as a teaching goal and achievement standard in a separate curriculum to instruct it with learning content. Second, it is necessary to provide an opportunity to learn about various estimation methods by presenting specific activities so that students can learn the estimation itself in a separate operation method. Third, in order to improve the computational estimating ability of addition and subtraction, contents related to the computational estimation need to be included in the achievement criteria, and discussions on the expansion of the areas, and the diversification of the instructing time will be needed.
Keywords
computational estimation; estimation; estimating; addition; subtraction; number sense; multi-dimensional curriculum; intended curriculum; written curriculum; implemented curriculum;
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Times Cited By KSCI : 2  (Citation Analysis)
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