어림 활동이 문제 해결 과정에서 개념 이해, 해답 예측, 계산에 미치는 영향: 속력과 밀도의 사례를 중심으로 = The Effects of Estimation Activities on Understanding Concepts, Predicting and Calculating Answers in Problem Solving Procedure: Cases of Speed and Density

다국어 초록 (Multilingual Abstract)

This article presents the effects of estimation activities related to speed and density on students` concept-understanding, answer-prediction, and answer-calculation in problem solving procedure with quantitative and qualitative methods. Participants were one hundred and ninety two seventh graders from one coeducational school in Seoul. Half of them participated in the estimation activities and the other half did in the measurement activities. Discussions of three students during estimation activities on density and their post-interviews were tape-recorded. Pre- and post-assessment scores were analyzed for the whole classes, and students` discussions and interviews Served this research as evidences for the case analysis. Results of scores indicated that students in the estimation activities were significantly better than those in the measurement activities for predicting answers, but not for understanding concepts. Analysis of the cases revealed that estimation activity helped them to understand the relations of mass, volume and density, empirically, which enhanced their prediction ability. Furthermore, the ability could help a student with low calculation ability to comprehend the calculation problems. Thus, it is concluded that estimation activities could influence students` empirical learning on quantitative concepts, which enhanced their prediction ability.