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The Comparison and Analysis of Models on Ratio and Rate in Elementary Mathematics Textbooks : Centering on Multiplicative Perspectives on Proportional Relationships and the Structure of Proportion Situations

초등 수학 교과서 비와 비율 단원의 모델 비교 분석 -비례에 대한 곱셈적 사고 및 비례 상황의 구조를 중심으로

  • Received : 2018.04.05
  • Accepted : 2018.04.25
  • Published : 2018.04.30

Abstract

This study investigated the models of four countries' elementary mathematics textbooks in Ratio and Rate and identified how multiplicative perspectives on proportional relationships and the structure of proportion situations are reflected in the textbooks. For this, textbooks of 5th and 6th grade textbooks in Korea Japan, Singapore and U.S. are compared and analyzed. As a result, we can find multiplicative perspectives on proportional relationships and the structure of proportion situations on pictorial models, ratio tables, double number lines and double tape diagrams. Also, the development of Japanese textbooks from multiple batches perspectives to variable parts perspectives and the examples of the use with two models together implied the connection and union of two multiplicative perspectives. Based on these results, careful verification and discussion for the next textbook is needed to develop students' proportional reasoning and teach some effective reasoning strategies. And this study will provide the implication for what kinds of and how visual models are presented in the next textbook.

본 연구는 4개국의 초등학교 수학 교과서 비와 비율 단원에서 어떠한 모델을 사용하고 있는지 알아보고, 비례에 대한 곱셈적 사고와 비례 상황의 구조에 따라 이러한 모델이 교과서에 어떻게 반영되어 있는지 살펴보았다. 이를 위해 한국, 일본, 싱가포르, 미국의 초등학교 5, 6학년 수학 교과서를 비교 분석하였다. 그 결과 그림 모델과 비표, 이중수직선, 테이프 다이어그램에서 비례에 대한 곱셈적 사고와 비례 상황의 구조에 따른 차이를 확인할 수 있었다. 또한 다중묶음관점에서 변동부분관점으로 이어지는 일본교과서의 전개나 두 가지 이상의 모델이 함께 쓰인 각 나라 교과서의 사례에서 곱셈적 사고의 연결 및 통합 가능성을 찾을 수 있었다. 따라서 학생들의 곱셈적 사고를 신장시키고 측정 공간 내 또는 측정 공간 사이의 비례추론을 지도하기 위해 차기 교과서에서 어떤 종류의 모델을 어떻게 제시하는 것이 효과적일지 좀 더 신중한 검증과 논의가 필요하다.

Keywords

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