한국과학교육학회지 (Journal of The Korean Association For Science Education)

  • 제27권3호
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  • Pages.212-224
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  • 2007
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  • 1226-5187(pISSN)
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  • 2288-8489(eISSN)
한국과학교육학회 (The Korean Association for Science Education)
권호 표지

실험 해석 과정에서 체계적 비유 사용에 의한 중학교 영재반 학생의 효소 개념 변화

Gifted Middle School Students' Conceptual Change of an Enzyme by Using Systematic Analogies during the Interpretation of Experimental Results

  • 발행 : 2007.04.30
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초록

물질대사는 생명 현상을 이해하는데 중추적 위치를 차지하고 있지만, 개념의 추상적 성격으로 인해 학생들이 이해하기 어려운 내용으로 알려져 있다. 이 연구의 목적은 (1) 효소 반응 실험의 결과 해석 과정에서 체계적 비유를 적용한 후에 나타난 학생의 개념 변화를 알아보고, (2) 학생들의 개념 변화에 기여한 체계적 비유의 역할을 확인하며, (3) 개념의 존재론적 속성에 따른 학생들의 개념 이해 정도 차이를 알아보는 것이다. 이러한 연구 목적을 위해 중학교 과학영재 34명을 대상으로 실시한 사전검사와 사후검사 결과, 실험보고서 내용, 수업 후에 뚜렷한 개념 변화를 보인 4명의 학생들을 대상으로 한 면담 결과 등의 자료를 수집하여 분석하였다. 그 결과 수업 후에 활성화 에너지 감소에 의한 효소 반응 촉진 기능 이해, 효소 구조에 따른 반응 속도 변화 이해, 효소 작용 기작에 대한 이해 정도가 전반적으로 향상되었지만, 개념의 존재론적 속성에 따라 학생의 이해 정도에 차이가 있는 것으로 나타났다. 사건 범주에 속하는 효소의 기능에 대한 이해 정도는 높았지만, 평형 범주에 속하는 효소 반응 기작에 대한 이해 정도는 낮게 나타났다. 효소 개념은 이처럼 평형 범주의 속성을 가지고 있어 학생들의 이해가 어렵지만, 본 연구에서 일부 학생들이 사건 범주의 효소 개념에서 평형 범주의 효소 개념으로 변화를 보였으며, 이러한 개념 변화에 체계적 비유가 기여한 것으로 나타났다.

Metabolism is one of the pivotal biology concepts, but many students have difficulty understanding it. The purposes of this study were (1) to explore 8th graders' conceptual change of an enzyme after classes of experimenting enzyme reaction and interpreting data using systematic analogies, (2) to discover the role of systematic analogies to enhance students' understanding, and (3) to explain students' difficulty understanding concepts as the ontological features. Systematic analogies were designed to encourage students to interpret their lab activities on enzyme reaction rates. Data were collected by using the pre-test and the post-test of open-ended form, students' worksheets, and interviews with students. After classes, the number of students to engender scientific conceptions about the function of enzyme, its structure, and its mechanism has increased. But more students failed to understand the reaction mechanisms having ontological features of equilibration processes than to understand the function of enzyme having ontological features of event-like processes. Even though the concepts of enzymes are hard to grasp owing to their ontological attributes of equilibration processes, a part of students' conceptions successfully progressed from the idea belonging to event-like processes to one belonging to equilibration processes. And systematic analogies were found to contribute in enhancing students' conceptual change of the enzyme reaction.

키워드

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