• 한국수학교육학회지시리즈C:초등수학교육
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• 제16권3호
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• pp.267-283
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• 2013

수학적 정당화란 일반적으로 적절한 근거에 기초하여 자신의 주장이 참임을 보이는 과정이라고 할 수 있다. 하지만 교실 실제에서의 수학적 정당화는 사회적 상호작용을 바탕으로 수학적 의사소통을 촉진하는 역할을 한다고 할 수 있다. 이에 본 연구는 수학적 정당화 활동이 학생들의 문제해결과 의사소통 과정에 미치는 영향을 조사하고자 하였다. 이를 위해 수학적 정당화 활동이 강조되는 문제해결 중심 수업을 실시하고 문제 이해 활동, 개별 탐구 활동, 소집단 토의 활동, 전체 논의 과정에서의 수학적 정당화 활동과 의사소통 과정을 분석하였다. 연구 결과 수학적 정당화 활동은 학생들이 다양한 문제해결 방법을 찾는데 도움을 주었고 의사소통 과정을 촉진하였으며, 다양한 표현 방법을 사용하도록 자극하였다. 또한 수학적 정당화 활동은 학생들의 이해를 평가하는 방법이 될 수 있으며, 교실에서의 사회적 관계 및 역동적인 교실 문화를 형성하는데 기여하였다.

• 대한수학교육학회지:학교수학
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• 제19권1호
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• pp.1-18
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• 2017

본 연구는 초등 예비교사의 수학적 문제제기 활동을 관찰하여 그 특징을 파악하고 문제제기 과정이 예비교사에게 제공하는 학습 기회를 분석하였다. 예비교사들의 문제제기 과정은 문제 조건 변형, 문제 성립 조건 탐구, 문제 구조 이해, 문제에서 생성된 개념탐구로 구성되었고, 각 단계에서 문제제기와 수학적 탐구가 결합하면서 다음 단계로 이어졌다. 탐구와 결합된 문제제기를 통해 예비교사들은 기존 개념을 재해석하고 새로운 수학적 대상을 발견하면서 수학적 개념들 사이의 연결성을 이해할 수 있었다. 예비교사들은 수학교육에서 문제제기의 중요성을 인식하였으며, 문제제기는 예비교사들에게 토론과 협력의 기회를 제공하였다.

• East Asian mathematical journal
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• 제31권2호
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• pp.167-188
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• 2015

Formula for the area of a trapezoid is an educational material that can handle algebraic and geometric perspectives simultaneously. In this note, we will make up the expression equivalent algebraically to the formula for the area of a trapezoid, and deal with the conversion of a geometric point of view, in algebraic terms of translating and interpreting the expression geometrically. As a result, the geometric conversion model, the first algebraic model, the second algebraic model are obtained. Therefore, this problem is a good material to understand the advantages and disadvantages of the algebraic and geometric perspectives and to improve the mathematical insight through complementary activity. In addition, these activities can be used as material for enrichment and gifted education, because it helps cultivate a rich perspective on diverse and creative thinking and mathematical concepts.

• 한국수학사학회지
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• 제32권2호
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• pp.47-59
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• 2019

Hua Loo-Keng(华罗庚, 1910-1985) is one of well-known prominent Chinese mathematicians. While Waring problem is one of his research interests, he made lots of contributions on various mathematical fields including skew fields, geometry of matrices, harmonic analysis, partial differential equations and even numerical analysis and applied mathematics, as well as number theory. He also had devoted his last 20 years to the popularization of mathematics in China. We look at his personal and mathematical life, and consider the meaning of his activity of popularizing mathematics from the cultural perspective to understand the recent rapid developments of China in sciences including mathematics and artificial intelligence.

• 대한수학교육학회지:학교수학
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• 제3권2호
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• pp.447-473
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• 2001

Since the greater part of mathematical concepts have been developed in the direction of “from the concrete and realistic aspects to the abstract level”, children should be secured to learn mathematics genetically with various manipulative materials. The aim of this study is to instigate the active use of geoboards in mathematics classroom. To achieve this arm, we first embodied the several significances on the use of geoboards in mathematics instruction. And we then performed an instruction that children discover and justify the formula related to the area of trapezoid by exploring with geoboards, and analyzed the instructional episode to support our assertion about some secure merit accompanied by using geoboards. From this study, we obtained the conclusion that geoboard activity contains many significances such as children can explore congruence, symmetry, similarity, fundamental properties of figures, and pattern. Futhermore, geoboard activity enable children to transform a figure into other equivalently, develop spatial sense, have basic experiences for coordinate geometry, build a concrete model to explain abstract ideas, and foster the ability of problem solving and mathematical thinking.

• 한국수학교육학회지시리즈D:수학교육연구
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• 제13권3호
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• pp.217-233
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• 2009

The purpose of this study is to describe how dynamic geometry systems can be useful in proof activity; teaching sequences based on the use of dynamic geometry systems and to analyze the possible roles of dynamic geometry systems in both teaching and learning of proof. And also dynamic geometry environments can generate powerful interplay between empirical explorations and formal proofs. The point of this study was to show that how using dynamic geometry software can provide an opportunity to link between empirical and deductive reasoning, and how such software can be utilized to gain insight into a deductive argument.

• 대한수학교육학회지:학교수학
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• 제3권2호
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• pp.295-324
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• 2001

Until now, There have been few studies to investigate a degree of abilities or interesting about mathematical problem-posing of first and second grades in elementary school. This is due to the fact that this students(1st and 2nd grades) have a limited amount of study time and their minds are not fully developed, and are lacking in their representation of ability to use the national language. This being the case, it is difficult to investigate their Mathematical problem-posing in a practical manner. However, our 7th elementary school Mathematics curriculum emphasizes the teaching and learning of Mathematical problem-posing from a basic level of first and second grade with emphasis on activity in teaming Mathematics. Through this study, having analysed the problems those children posed, I have found out they improved in numbers and correctness of their posed problems. And I too could found out showing to their much interesting and confidence to mathematical problem-posing and could confirmed for the children to admit themselves its merits through analyzing some questions to ask their opinions to it. I expect that this study can help to develop the teaching and learning materials for mathematical problem-posing and also to improve its methods of elementary school mathematics. The next study task is, I think, that it is necessary to accumulate the studies to investigate and analyse the practical learning activities of children for problem-posing contents of mathematics text books.

• 한국수학교육학회지시리즈A:수학교육
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• 제53권4호
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• pp.479-492
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• 2014

According to Krutetskii, the education of mathematically gifted students must be focused on the improvement of creative mathematical ability and the mathematically gifted students need to experience the research process like mathematician. Independent study is highly encouraged as the self-directed activity of highest level in the learning process which is similar to research process used by experts. We conducted independent study as a viable differentiation technique for gifted middle school students in the 3rd grade, which participated in mentorship program for 10 months. Based on the data through the research process, interview with a study participant and his parents, and his blog, we analyzed mathematical behavior characteristics of a study participant. This behavior characteristics are not found in all mathematically gifted students. But through this case study, we understand mathematically gifted students better and furthermore obtain the message for the selection and education of the mathematically gifted students and for the effective method of running mentorship program particularly.

• 한국수학교육학회지시리즈A:수학교육
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• 제54권2호
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• pp.119-141
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• 2015

As the population of senior citizens has been increasing very rapidly, the importance of their education is gradually emphasized. To maintain their mental and physical health, the solution on the biological, physical, and educational approach might be helpful and effective. Especially in the aspect of the educational approach, the mathematics education can be regarded as an important subject for keeping the seniors in a good mental health. The reason is that the ultimate goal of mathematics education is to pursue an enhancement of mathematical thinking ability. By the reason, this study aimed to develop mathematical materials for enhancing seniors' thinking ability, and the seniors usually belong to fifties and sixties. To this purpose, this study selected the six essential mathematical thinking elements and four mathematical domains of 'number and operation', 'shape and measurement', 'possibility', and 'patterns'. Based on these elements, the mathematical materials including the nine types of activities using games and commercial manipulatives were developed. On the subject of 52 female seniors, the instruction was conducted using a part of the materials during 100 minutes. Also, 13 survey items were developed beforehand, and the survey was implemented after the class, and eventually 48 seniors responded in the survey. As a result, it is meaningful to develop the materials not only for enhancing mathematical thinking ability but for understanding and utilizing the content of materials. Furthermore, it is requested that those materials be differentiated according to the degree or the difference of age, academic ability, and sex.

• 대한조선학회논문집
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• 제28권1호
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• pp.197-205
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• 1991

생산계획 최적화를 도모하기 위하여 선박조립공정을 구성하는 소 생산단위인 activity에 대한 수학적인 cost model을 수립하는 방법을 제시하였다. 이 cost model의 수립은 실제로 work study 방법을 이용하여 작업자수와 작업시간간의 관계식을 작성하고 Marginal costing 개념을 이용하여 해당기업의 연간 총 cost를 각 생산자원의 사용량에 분배하여 단위공수 및 단위시설 사용량에 대한 cost를 산출함으로서 이루어진다. 이 방법을 실제의 한 activity의 예에 적용하여 보고 일반적인 방법을 제시하였다.