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Pre-service teachers' errors and difficulties in task modification focusing on cognitive demand

수학 예비교사들이 과제의 인지적 노력 수준 변형에서 겪는 오류와 어려움

  • Received : 2020.12.22
  • Accepted : 2021.01.28
  • Published : 2021.02.28

Abstract

The purpose of this study is to analyze the errors and difficulties which pre-service secondary teachers shows during the task modification in consideration of the cognitive demand and to provide significant implications to the pre-service teacher education program related to the modification of the mathematical tasks. In the pursuit of this purpose, tasks were selected from perpendicular bisector units and 24 pre-service teachers were asked to modify the tasks to higher and lower level tasks. After the modification activities, opportunities for reflection and modification were provided. The findings from analysis are as follows. Pre-service teachers had a difficulty to distinguish between PNC tasks and PWC tasks. Also, We identified the interference phenomena that pre-service teachers depended on the apparent elements of the task. Pre-service teachers showed a tendency to overlook the learning objectives and learning hierarchy during the task modification, and to focus on some types of task modification. However, pre-service teachers were able to have meaningful learning opportunities and extend the category of tools to technology including Geogebra through self-reflection and correction activities on task modification. The above results were summed up and we presented the implications to the task modification program in the pre-service secondary teacher education.

본 연구는 수학 예비교사들이 과제의 인지적 노력 수준 변형에서 겪는 오류와 어려움을 분석하여, 수학 과제 변형과 관련한 수학 예비교사 교육에 유의미한 시사점을 제공하는 것을 목적으로 한다. 이를 위해 24명의 수학 예비교사들을 대상으로 수직이등분선의 성질에 대한 추론 과제를 높은 수준과 낮은 수준으로 변형하는 활동과 이에 대한 반성 및 수정 기회를 제공하였다. 변형 과제를 중심으로 예비교사들이 과제의 수준 변형에서 겪는 오류와 어려움을 분석한 결과, 과제 수준의 판단 관점에서 PNC와 PWC 과제의 구분에 제한된 이해를 보였으며, 과제의 외형적인 요소에 의존하는 간섭 현상을 확인하였다. 과제 수준의 변형 관점에서 예비교사들은 과제의 목표와 수직적 위계를 간과하거나 변형 유형의 편향성을 보였다. 한편 예비교사들은 반성 및 수정 활동을 통해 자신들의 변형 과제의 오류를 인식하고 개선할 수 있었으며, 도구의 범주를 Geogebra를 포함한 공학적 도구로 확장하는 모습을 보여주었다.

Keywords

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