• 한국과학교육학회지
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• 제30권3호
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• pp.366-374
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• 2010

The purpose of this study was grouping students' perception types on the unexpected results in experiments, and looking into how the problem-solving experiment affected the change of these perception types. In order to answer this, interview data were analyzed in terms of perception types, and through analysis of questionnaires carried out at the beginning and the end of the semester, the change of perception types was researched. As a result, perception types of students divided into 'the difference between theory and practice,' 'inexperience of experiment skill,' and 'No reading between lines in manual.' After performing the problem-solving experiment for one semester, the perception of 'the difference between theory and practice' declined, and the desire for 'reading between lines' increased, so the problem-solving experiment influenced on the change of perception positively.

• 한국과학교육학회지
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• 제26권1호
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• pp.16-24
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• 2006

본 연구에서는 실생활 소재를 사용한 문제해결형과 과제해결형 탐구 활동을 적용했을 때, 학생 간 상호작용의 양상을 조사하였다. 연구를 위해, 충북 청원군 소재 중학교 3학년 학생 5명의 실험 수업을 관찰하고, 녹음 및 녹화 후 기록 원고를 작성 분석하였다. 학생들의 대화를 질문, 설명, 사고, 메타인지의 4가지 상호작용 유형으로 분류하고, 각 유형별 학습 접근 수준은 심층적-피상적 접근으로 분류하였다. 실험 형태별 언어적 상호작용의 수와 학습 접근 수준 비교 결과, 문제해결형 탐구실험은 문제점 발견에서 해결까지 상호작용의 수가 문제 발생 이전에 비해 2배 가량 증가하는 것을 볼 수 있었으며, 심층적 접근 수준의 상호작용의 수도 4배 정도 증가하는 것으로 나타났다. 한편, 과제해결형 탐구실험에서는 실험과정 중 상호작용의 수가 고루 분포하였다. 또한 학생들은 문제해결형 탐구실험에서 보다 많은 심층적 접근의 상호작용을 보이는 것으로 나타났다.

• 수산해양교육연구
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• 제28권1호
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• pp.300-314
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• 2016

The purpose of this study was to examine the effects of small-group discussion and panel discussion as teaching and learning methods on college students' competencies of communication, problem-solving and leadership in a general education course. Participants were 52 college students, and they participated in the 13-session lessons. The data from questionnaires collected before and/or after the experiment were analyzed using a paired t-test and percent. The results were as follows. First, each 'total' competency in communication, problem-solving and leadership was increased statistically significant after the experiment. Second, in subdomains of each key competency, 'directed communication' and 'understanding the perspective of others' in communication, and 'divergent thinking', 'decision-making' and 'assessment' subdomains in problem-solving, and all subdomains in leadership were increased statistically significant after the experiment. Based on the results and students' opinions about discussions, the education implications for small-group discussion and panel discussion were discussed.

• 한국생활과학회지
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• 제15권4호
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• pp.551-561
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• 2006

The purpose of the study is to examine the influence of children's familiarity with a task and teachers' feedback on their problem solving performances. It was assumed that children's' problem solving performance would be different depending on the children's familiarity with a task and the feedback from teachers. The study also examined whether children's' problem solving competence would be different depending on their gender and age. The experiment was conducted with two experimental tools. The subjects were 58 children who were 5 to 6-year-old, enrolled in kindergartens in Koyang city in Kyunggi province. The collected data were processed with SPSS 11.0 program to get the average and the standard deviations, and with one-way ANOVA and two-way ANOVA with repeated measures. The results of the experiment are as follows; First, children's' problem solving competence was different depending on their age. Older children showed higher performance than younger children, while there's no difference in children's performance depending on their gender. Second, the teachers' feedback didn't influence children's problem solving performance. Third, children showed higher performance when familiar tasks were provided, compared to when typical tasks were provided. Finally, this study found that children's task familiarity has an influence on their problem solving performance.

• 한국수학교육학회지시리즈D:수학교육연구
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• 제15권1호
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• pp.31-44
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• 2011

An impetus for reviving research in mathematical problem solving is the recent advance in methodological thinking, namely, the design experiment ([Gorard, S. (2004). Combining methods in educational research. Maidenhead, England: Open University Press.]; [Schoenfeld, A. H. (2009). Bridging the cultures of educational research and design. Educational Designer. 1(2). http://www.educationaldesigner.orgied/volume1/issue21]). This methodological approach supports a "re-design" of contextual elements to fulfil the overarching objective of making mathematical problem solving available to all students of mathematics. In problem solving, components critical to successful design in one setting that may be adapted to suit another setting include curriculum design, assessment strategy, teacher capacity, and instructional resources. In this paper, we describe the implementation, over three years, of a problem solving module into the main mathematics curriculum of an Integrated Programme school in Singapore which had sufficient autonomy to tailor-fit curriculum to their students.

• 한국학교수학회논문집
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• 제11권2호
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• pp.159-175
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• 2008

문제해결은 우리나라 제 7차 개정 교육과정에서 학교수학의 목표, 교수-학습 방법의 제안, 평가의 제안, 교육기자재 활용 목적 등 여러 측면에서 명시적으로 강조되고 있다. 본 연구에서는 장차 현상의 수학수업을 이끌어 갈 예비수학교사들의 문제해결 지도 능력을 실제적으로 개발하는데 초점을 두었다. 연구의 과정에서는 사법대학 수학교육과 3학년 학생들을 대상으로 정규 수업시간을 활용하여 문제해결 지도에 중점을 둔 지도과정을 구성, 실행하도록 안내하였다. 연구의 실행에서 얻은 자료를 분석하여 문제해결 중심의 지도과정 구성 및 실행에 대한 교육적 효과를 정리하고 문제해결 중심의 지도과정 실행을 통해 에비수학교사들이 수학수업에 대해 갖게될 생각의 변화를 알아보았다. 이를 토대로 예비수학교사교육을 위한 발전적인 시사점을 제시하였다. 본 연구에서는 사법대학의 교사교육에서 이론적 지식에 대한 지도 못지않게 방법적 지식에 대한 지도도 중요함을 부각시키고 방법적 지식의 지도를 위한 구체적이고 실천적인 사례를 제시했다는 측면에서 큰 의의가 있다.

• Educational Technology International
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• 제11권2호
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• pp.1-24
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• 2010

The study aimed to investigate the differential effects of visual and verbal scaffoldings on web-based problem solving performance. A quasi-experiment with 143 high school students in South Korea was administered. Each student's visualization tendency score was obtained at the beginning of the study. Based on the visualization tendency scores, students were divided into two groups; low and high level visualization tendency groups. Then each group was split in half and randomly assigned to one of the two lessons - one with visual scaffolding and the other with verbal scaffolding. The contents of the two lessons were the same. All students' performance was measured through an essay assignment for a problem solving at the end of the lesson. The result showed that the visual scaffolding group outperformed the verbal scaffolding group (F=22.54, p<.01), regardless of each student's visualization tendency level. The effect size was 0.81, indicating high practical significance. There was no statistically significant interaction effect between scaffolding modalities and students' visualization tendency levels. These findings imply that visual scaffolding is an effective strategy to promote students' problem solving performance.

• 대한수학교육학회지:학교수학
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• 제11권3호
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• pp.497-511
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• 2009

본 연구는 서울시에 위치한 초등학교 3학년 아동 53명을 대상으로 도식기반 전략 프로그램으로 수학 문장제를 교수함에 있어 중재재료 투입방법(병렬, 순차)에 따른 수행결과를 처치집단, 문제유형(결합, 변화, 비교), 회기별(사전검사, 사후검사 3회)로 알아보고자 하였다. 사전, 사후검사 문항은 곱하기와 나누기 연산을 필요로 하는 결합, 변화, 비교 문제로 각 3문제씩 9문제로 구성되었으며 각 회기가 끝난 다음날 바로 사후검사로 수행 정도를 측정하였다. 본 연구결과에 따르면 문장제 유형별 수행이 교수재료 투입시기에 큰 영향을 받지 않았으나 문제구조가 유사한 결합형 문제와 변화형 문제인 경우 나중에 교수한 변화문제의 도식이 결합문제의 도식 생성에 혼란을 주어 결합문제의 수행이 떨어지는 결과가 나타났다.

• 대한산업공학회지
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• 제17권2호
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• pp.131-142
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• 1991

The concept of criterion function is proposed as a framework for comparing the geometric and computational characteristics of various nonlinear programming approaches to linear programming such as the method of centers, Karmakar's algorithm and the gravitational method. Also, we discuss various computational issues involved in obtaining an efficient parallel implementation of these methods. Clearly, the most time consuming part in solving a linear programming problem is the direction finding procedure, where we obtain an improving direction. In most cases, finding an improving direction is equivalent to solving a simple optimization problem defined at the current feasible solution. Again, this simple optimization problem can be seen as a least squares problem, and the computational effort in solving the least squares problem is, in fact, same as the effort as in solving a system of linear equations. Hence, getting a solution to a system of linear equations fast is very important in solving a linear programming problem efficiently. For solving system of linear equations on parallel computing machines, an iterative method seems more adequate than direct methods. Therefore, we propose one possible strategy for getting an efficient parallel implementation of an iterative method for solving a system of equations and present the summary of computational experiment performed on transputer based parallel computing board installed on IBM PC.

• 경영과학
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• 제20권2호
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• pp.81-93
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• 2003

These days we come across many wicked problems whose solutions are beyond individuals intellectual ability. These problems can be resolved through collaborative group interaction. We developed an internet-based asynchronous group interaction support system, after looking into the collaborative problem solving process and the IBIS (Issue-Based Information System) argumentation model. It has the following characteristics ; 1) it is developed based on the modified IBIS model which is a model for group interaction to resolve wicked problems ; 2) it supports both processes of seeking and comparing solutions, while most similar systems do not have a feature to support the latter process ; 3) different structures can be defined dynamically according to the purpose of group interaction, so that it could be used for collaborative problem solving in a specific domain. To show the usability of the system, we carried out an experiment, whose result is shown at the end.