Education of Primary School Mathematics (한국수학교육학회지시리즈C:초등수학교육)

Korean Society of Mathematical Education (한국수학교육학회)
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A Case Study on the Students' Covariational Reasoning in the Continuous Functional Situations

함수적 상황에 대한 초등학생들의 공변추론 사례연구

  • Hur, Joonho (Department of Mathematics Education, Graduate School of Education, Seoul National University of Education) ;
  • Park, Mangoo (Department of Mathematics Education, Seoul National University of Education)
  • Received : 2017.12.25
  • Accepted : 2018.01.28
  • Published : 2018.01.31
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Abstract

The purpose of this study is to investigate the effects of cognitive activity on cognitive activities that students imagine and cope with continuously changing quantitative changes in functional tasks represented by linguistic expressions, table of value, and geometric patterns, We identified covariational reasoning levels and investigated the characteristics of students' reasoning process according to the levels of covariational reasoning in the elementary quantitative problem situations. Participants were seven 4th grade elementary students using the questionnaires. The selected students were given study materials. We observed the students' activity sheets and conducted in-depth interviews. As a result of the study, the students' covariational reasoning level for two quantities that are continuously covaried was found to be five, and different reasoning process was shown in quantitative problem situations according to students' covariational reasoning levels. In particular, students with low covariational level had difficulty in grasping the two variables and solved the problem mainly by using the table of value, while the students with the level of chunky and smooth continuous covariation were different from those who considered the flow of time variables. Based on the results of the study, we suggested that various problems related with continuous covariation should be provided and the meanings of the tasks should be analyzed by the teachers.

본 연구의 목적은 초등학교 4학년 학생들이 그래프가 아닌 언어적 표현이나 대응표, 기하학적 패턴 등으로 표현된 함수 과제에서 연속적으로 변하고 있는 두 양의 변화에 대한 공변추론 수준을 파악하고 공변추론 수준 및 추론 과정에 나타나는 특징을 분석하는 것이다. 연구 참여자들은 검사지를 통해 선정된 초등학교 4학년 학생 7명이며, 선정된 학생들의 학습지 분석 및 면담을 실시하였다. 연구 결과 학생들의 공변추론 수준은 5가지로 파악되었으며, 공변추론 수준에 따라 양적 문제 상황에서 다른 추론과정을 보였다. 특히, 공변추론 수준이 낮은 학생들은 두 변수의 파악에 어려움을 가지고 있었고 대응표를 중심으로 문제를 해결한 반면, 연속공변 수준의 학생들은 시간 변수의 흐름을 생각할 수 있다는 차이가 있었다. 연구 결과로부터 공변추론 관련 다양한 과제의 제시와 각 과제의 의미에 대한 교사들의 탐구가 필요함 등을 시사점으로 제시하였다.

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References

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