A study on analyzing the improvement of the students' estimation capabilities of length measurement in measurement instruction with various uses of estimation strategy

Abstract

본 연구의 목적은 현 2009개정 교육과정 초등학교 2학년 수학 교과에 미비하게 다루어져있는 어림 측정 영역을 강화하여 학생들의 길이 어림에 대한 이해와 어림 능력의 변화를 살펴보는 것이다. 이에 본 연구에서는 어림 측정 내용을 세 가지 어림 전략을 투입하여 어림을 강화한 수업으로 재구성하여 학생들에게 수업한 후 학생들의 길이 어림에 대한 이해가 길이 어림 능력에 미치는 영향에 대하여 살펴보았다. 연구 결과, 학생들은 어림의 의미를 정확히 이해하고 상황에 따라 적절한 어림 전략을 활용하여 오차를 줄여나가는 모습을 보였다. 또한 어림 전략을 활용하여 문제 해결 과정을 논리적으로 설명하는 능력도 향상되었다. The purpose of this study is the reorganization of the curriculum on the measurement, a part of the second grade math curriculum, for the improvement of the estimation capability in the elementary school students. Research questions were as follows: (1) how are the estimation capabilities of the students who have taken lessons on the diversified estimation strategies? and (2) how are the mathematical writing capabilities of the students who have taken lessons on the diversified estimation strategies? The study using reconstructed lessons was conducted on 18 second grade students in an elementary school located in Seoul. Results show that the students' estimation capabilities and have improved. They started to use 'about' when writing estimation results, different from writing the accurate measurements. Measurement errors were gradually reduced, ending up with a student who could accurately estimate exactly 1m. In addition, their estimation capabilities in using appropriate estimation strategy and writing skills describing the estimation strategy have improved.

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