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‘좌우대칭 자’를 활용한 5학년 학생들의 점대칭도형의 의미 이해

A Study on 5th Graders' Understandings of the Meaning of Symmetric Figure for a Point Using the ‘Bilateral Symmetric Ruler’

이광호|김순영
뇌·AI기반교육연구소 (Institute of Brain·AI based Education)|2019.09|Brain, Digital, & Learning|제9권 제3호|pp. 253-270|DOI https://doi.org/10.31216/BDL.2019.9.3.253

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키워드

reflectionconstructionSymmetryrotationpoint symmetrysymmetric figure for a pointpoint reflectionbilateral symmetric ruler

초록

The purpose of this study is to analyze 5th graders’ Understandings of the meaning of Symmetric Figure for a Point and the types of problems or errors while constructing and to develop student’s Understandings using the New Educational Method. By the literature I arranged the complex meaning of ‘Symmetry’ in the sight of transformation, analyzed curriculums of Korea and other countries about ‘Point Symmetry’, and found out the cause of students’ difficulties while constructing the Symmetric Figure for a Point. For solving this problem I made the ‘Bilateral Symmetric Ruler’ and ‘Problems without the grid’. And students had the lessons of construction of Symmetric Figure for a Point using them. After the lesson, I analyzed the effectiveness of the new educational method using the questionnaire and the interview.

Abstract

The purpose of this study is to analyze 5th graders’ Understandings of the meaning of Symmetric Figure for a Point and the types of problems or errors while constructing and to develop student’s Understandings using the New Educational Method. By the literature I arranged the complex meaning of ‘Symmetry’ in the sight of transformation, analyzed curriculums of Korea and other countries about ‘Point Symmetry’, and found out the cause of students’ difficulties while constructing the Symmetric Figure for a Point. For solving this problem I made the ‘Bilateral Symmetric Ruler’ and ‘Problems without the grid’. And students had the lessons of construction of Symmetric Figure for a Point using them. After the lesson, I analyzed the effectiveness of the new educational method using the questionnaire and the interview.

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