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자료유형
학술저널
저자정보
저널정보
영남수학회 East Asian Mathematical Journal East Asian Mathematical Journal 제33권 제2호
발행연도
2017.1
수록면
177 - 197 (21page)

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The purpose of this study is to investigate and analyze the understandings of elementary pre-service teachers about ‘estimation’ in the elementary mathematics. Together with this analysis, we identify elementary pre-service teacher’s Mathematical Pedagogical Contents Knowledge(MPCK), especially focusing to Subject Matter Knowledge(SMK). In order to this goals, we investigate contents relating to ‘estimation’ from 1st curriculum to 2009 revised curriculum and compare ‘rounding up’, ‘rounding off’, ‘rounding’ in the elementary mathematics textbooks. As results of investigations, ‘estimation’ has been teaching at the ‘Measurement’ domain from 3rd curriculum, but contexts of measuring weaken from 7th curriculum. ‘Rounding up(off)’ is defined three types in the textbooks from 1st to 2009 revised curriculum. And we examine elementary pre-service teachers through the questions on these ‘estimation’ contents. On the analysis of pre-service teacher’s understanding relating MPCK, four themes is summarized as followings; the understanding of ‘0’ in the ‘rounding up’, the cognitive gap between ‘rounding up’ and ‘rounding off’, the difference of percentage of correct answers according to types of question in the ‘rounding up’, and the difference between the definition of ‘rounding up’ and the definition of ‘rounding’.

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