• 한국수학교육학회지시리즈A:수학교육
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• 제46권4호
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• pp.503-519
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• 2007

In this study, the instrument of mathematical problem posing ability and mathematical creativity ability tests were considered, and the differences between gifted and regular students in the ability were investigated by the test. The instrument consists of each 10 items and 5 items, and verified its quality due to reliability, validity and discrimination. Participants were 218 regular and 100 gifted students from seventh grade. As a result, not only problem solving but also mathematical creativity and problem posing could be the characteristics of the giftedness.

• 한국수학교육학회지시리즈A:수학교육
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• 제42권1호
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• pp.57-67
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• 2003

In this paper we analyze educational aspects of a mathematical problem. As a result of the analysis, we extract five meaningful mathematical knowledge and ideas. Corresponding with these we suggest some chains of mathematical problems that are expected to activate student's self-oriented mathematical investigation.

• 한국수학교육학회지시리즈A:수학교육
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• 제42권2호
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• pp.137-157
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• 2003

Mathematical Problem solving has had the largest focus in the spread of mathematical topics since 1980. In Korea, most of the articles on problem solving appeared 1980s and 1990s, during which there were special concerns on this issue. And there is general acceptance of the idea that the famous statement "Problem solving must be the focus of school mathematics"(NCTM, 1980, p.1) in Agenda for Action, reflected in the curriculum of Korea. In a historical review focusing on the problem solving in the National Curriculum of Mathematics, we can infer that the primary goal of mathematics instruction should be to have students become competence problem solver. However, the practices of mathematics classroom and the trends of research in mathematical problem solving have oriented to ′teaching about problem solving′ and ′teaching for problem solving′. The issue of teaching via problem solving′ remain unsolved in the community of mathematics education and we need much more attention to this issue.

• 한국수학교육학회지시리즈A:수학교육
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• 제57권2호
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• pp.111-136
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• 2018

This study suggests a framework for analyzing items based on the characteristics, and shows the relationship among the characteristics, difficulty, percentage of correct answers, academic achievement and the actual mathematical problem solving competency. Three mathematics educators' classification of 30 items of Mathematics 'Ga' type, on 2017 College Scholastic Ability Test, and the responses given by 148 high school students on the survey examining mathematical problem solving competency were statistically analyzed. The results show that there are only few items satisfying the characteristics for mathematical problem solving competency, and students feel ill-defined and non-routine items difficult, but in actual percentage of correct answers, routineness alone has an effect. For the items satisfying the characteristics, low-achieving group has difficulty in understanding problem, and low and intermediate-achieving group have difficulty in mathematical modelling. The findings can suggest criteria for mathematics teachers to use when developing mathematics questions evaluating problem solving competency.

• 한국수학교육학회지시리즈D:수학교육연구
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• 제13권3호
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• pp.181-195
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• 2009

Students' approaches to mathematical problem solving vary greatly with each other. The main objective of the current study was to compare students' performance with different thinking styles (divergent vs. convergent) and working memory capacity upon mathematical problem solving. A sample of 150 high school girls, ages 15 to 16, was studied based on Hudson's test and Digit Span Backwards test as well as a math exam. The results indicated that the effect of thinking styles and working memory on students' performance in problem solving was significant. Moreover, students with divergent thinking style and high working memory capacity showed higher performance than ones with convergent thinking style. The implications of these results on math teaching and problem solving emphasizes that cognitive predictor variable (Convergent/Divergent) and working memory, in particular could be challenging and a rather distinctive factor for students.

• 한국수학교육학회지시리즈A:수학교육
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• 제57권3호
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• pp.289-309
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• 2018

There has been a gradually increasing focus on adopting mathematical modeling techniques into school curricula and classrooms as a method to promote students' mathematical problem solving abilities. However, this approach is not commonly realized in today's classrooms due to the difficulty in developing appropriate mathematical modeling problems. This research focuses on developing reformulation strategies for those problems with regard to mathematical modeling. As the result of analyzing existing textbooks across three grade levels, the majority of problems related to the real-world focused on the Operating and Interpreting stage of the mathematical modeling process, while no real-world problem dealt with the Identifying variables stage. These results imply that the textbook problems cannot provide students with any chance to decide which variables are relevant and most important to know in the problem situation. Following from these results, reformulation strategies and reformulated problem examples were developed that would include the Identifying variables stage. These reformulated problem examples were then applied to a 7th grade classroom as a case study. From this case study, it is shown that: (1) the reformulated problems that included authentic events and questions would encourage students to better engage in understanding the situation and solving the problem, (2) the reformulated problems that included the Identifying variables stage would better foster the students' understanding of the situation and their ability to solve the problem, and (3) the reformulated problems that included the mathematical modeling process could be applied to lessons where new mathematical concepts are introduced, and the cooperative learning environment is required. This research can contribute to school classroom's incorporation of the mathematical modeling process with specific reformulating strategies and examples.

• 한국초등수학교육학회지
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• 제20권2호
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• pp.311-331
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• 2016

본 연구는 학습자 스스로 수학적 오류를 분석하고 반성적 문제 만들기 활동을 하도록 한 것이 문제해결력과 수학적 태도에 미치는 영향을 알아보기 위한 것이다. 본 연구를 위하여 서울특별시 강서구에 소재한 초등학교 5학년 2개 반(62명)을 대상으로 실험집단과 비교집단을 선정하였다. 연구 결과 반성적 문제 만들기 활동은 학생들로 하여금 구하고자 하는 것을 파악하는 능력과 문제를 해결하는데 필요한 조건을 선별하여 활용하는 능력을 향상시켜 학생들의 문제해결력 향상에 효과적이었다. 또한, 학습자가 가지고 있었던 수학적 오개념을 수정하고 올바른 수학적 개념을 정립하는데 도움을 주었다. 그리고 반성적 문제 만들기 활동은 학생들의 수학적 의지를 향상시키고 반성적 사고를 촉진시키며, 반성의 과정에서 자연스럽게 스스로 자신의 문제를 풀이 과정을 점검하는 습관을 갖도록 하는데 도움을 주었다. 학습자는 반성적 문제가 올바르게 만들어졌는지 점검하고 이것을 바르게 해결하기 위해, 토의 활동에서 타인과의 수학적 의사소통에 적극적으로 참여하는 모습과 함께 끝까지 스스로 문제를 해결하고자 하는 과제집착력을 강하게 나타냈다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1994년도 Proceedings of the Korea Automatic Control Conference, 9th (KACC) ; Taejeon, Korea; 17-20 Oct. 1994
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• pp.307-312
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• 1994

The authors have been devoted to researches on fuzzy theories and their applications, especially control theory and application problems, for recent years. In this paper, the authors present results on a comparison of optimal solutions between ones of an ordinary-typed mathematical linear programming problem(O.M.I.P. problem) and ones of a Zimmerman-typed fuzzy mathematical linear programming problem (F.M.L.P. problem), and comment about the sensitivity (differences and fuzziness on between O.M.L.P. problem and F.M.L.P. problem) on optimal solutions of these mathematical linear programming problems.

• 한국초등수학교육학회지
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• 제12권2호
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• pp.101-124
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• 2008

본 연구에서는 초등학교 5학년 학생들을 대상으로 구조중심 협동학습을 적용한 문제 만들기 학습이 수학학업성취도 및 수학적 성향에 어떠한 효과가 있는지를 분석하여 초등학교 학습지도에 도움을 줄 수 있는 교수-학습 방법을 제공하기 위한 것이다. 여기서 활용한 문제 만들기 학습 유형은 송민정(2004)의 내용을 참고로 하였으며, 협동학습 구조를 수업 시에 적절히 활용함으로써 학생들에게 수학에 대한 관심과 흥미를 유발시켜서 학업성취도 및 수학적 성향에 긍정적인 영향이 있음을 알 수 있었다.

• 한국수학교육학회지시리즈A:수학교육
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• 제44권4호
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• pp.565-586
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• 2005

The purpose of this paper is to analyze the selection difference of mathematical problem solving strategy by mathematical learning style, that is, the intellectual, emotional, and physiological factors of students, to allow teachers to instruct the mathematical problem solving strategy most pertinent to the student personality, and ultimately to contribute to enhance mathematical problem solving ability of the students. The conclusion of the study is the followings: (1) Students who studies with autonomous, steady, or understanding-centered effort was able to solve problems with more strategies respectively than the students who did not; (2) Student who studies autonomously or reconfirms one's learning was able to select more proper strategy and to explain the strategy respectively than the students who did not; and (3) The differences of the preference to the strategy are variable, and more than half of the students were likely to select frequently the strategy 'to use a formula or a principle' regardless of the learning style.