• 한국학교수학회논문집
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• 제15권2호
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• pp.349-369
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• 2012

본 연구에서는 수학교육분야에서 전문성 신장 프로그램 연구 및 수행에 대한 고찰을 통해 드러나는 다섯 가지 중요한 범주들이 기술되었다: (1) 효율적인 지원 공동체 수립, (2) 교사 지식에의 주목, (3) 학생의 학습에 대한 지식을 기반으로 한 교사지식의 구성, (4) 인식기반 및 개념기반 관점, (5) 장기간에 걸친 현장에서의 교사교육. 결론에서는 바람직한 교사교육 프로그램이 포함해야 할 요소들과 앞으로 이 분야에서 이루어져야할 연구방향 등이 제시된다.

• East Asian mathematical journal
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• 제27권2호
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• pp.181-202
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• 2011

The study was planned to analyze the figure concepts teachers have according to the years of experiences based on the two aspects, the subject matter knowledge and the pedagogical content knowledge. Further, it aims to have the results utilized in teacher education and training, and ultimately to help elementary school students to establish the accurate figure concepts. We administered the test to the random sample of 77 elementary school teachers of the grade 3 to grade 6, from nine schools of the Daegu, Ulsan and Gyeongsangbuk-do districts, and we analyzed the results. Correlational analysis between the years of experience and the knowledge showed that the content understanding and knowledge decreases as the years of experience increases, while the experiential knowledge related to the understanding of the students and the pedagogical methods increases as the years of experience increases.

• 한국수학교육학회지시리즈D:수학교육연구
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• 제16권2호
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• pp.125-135
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• 2012

Students not only learn mathematics knowledge, but also have the capability of mathematical creativity. The latter has been thought an important task in mathematics education by more and more mathematicians and mathematics educators. In this paper, mathematicians' methods of creating mathematics are presented. Then, the paper elaborates on how these methods can be utilized to enhance mathematical creativity in the schools.

• Journal of the Korean Society for Industrial and Applied Mathematics
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• 제18권3호
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• pp.225-244
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• 2014

In this work, we discuss segmentation algorithms based on the level set method that incorporates shape prior knowledge. Fundamental segmentation models fail to segment desirable objects from a background when the objects are occluded by others or missing parts of their whole. To overcome these difficulties, we incorporate shape prior knowledge into a new segmentation energy that, uses global and local image information to construct the energy functional. This method improves upon other methods found in the literature and segments images with intensity inhomogeneity, even when images have missing or misleading information due to occlusions, noise, or low-contrast. We consider the case when the shape prior is placed exactly at the locations of the desired objects and the case when the shape prior is placed at arbitrary locations. We test our methods on various images and compare them to other existing methods. Experimental results show that our methods are not only accurate and computationally efficient, but faster than existing methods as well.

• 대한수학교육학회지:수학교육학연구
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• 제11권2호
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• pp.239-256
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• 2001

The notion of metaphor has been increasingly popular in research of mathematics education. In particular, metaphor becomes a useful unit for analysis to provide a profound insight into mathematical reasoning and problem solving. In this context, this paper takes metaphor as an analytic unit to examine the relationship between objectivity and subjectivity in mathematical reasoning. Specifically, the discourse analysis focuses on the code switching between literal language and metaphor in mathematical discourse. It is shown that the linguistic code switching is parallel with the switching between two different kinds of mathematical knowledge, that is, factual knowledge and mathematical imagination, which constitute objectivity and subjectivity in mathematical reasoning. Furthermore, the pattern of the linguistic code switching reveals the dialectical relationship between the two poles of mathematical reasoning. Based on the understanding of the dialectical relationship, this paper provides some educational implications. First, the code-switching highlights diverse aspects of mathematics learning. Learning mathematics is concerned with developing not only technicality but also mathematical creativity. Second, the dialectical relationship between objectivity and subjectivity suggests that teaching and teaming mathematics is socioculturally constructed. Indeed, it is shown that not all metaphors are mathematically appropriated. They should be consistent with the cultural model of a mathematical concept under discussion. In general, this sociocultural perspective on mathematical metaphor highlights the sociocultural organization of teaching and loaming mathematics and provides a theoretical viewpoint to understand epistemological diversities in mathematics classroom.

• 대한수학교육학회지:학교수학
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• 제11권4호
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• pp.607-623
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• 2009

본 연구에서는 받아올림이나 받아내림이 있는 가감 연산에 대한 한 아동의 비형식적 지식에 대해 조사하였다. 관련 내용을 아직 학습하지 않은 한 명의 1학년 학생을 대상으로 세 가지 유형의 문제-받아올림 및 받아내림의 기본이 되는 십몇이 되는 덧셈과 십몇과 몇의 차, 받아올림이 있는 두 자리 수와 한 자리 수의 합 및 두 자리수끼리의 합, 받아내림이 있는 두 자리 수와 한 자리 수의 차 및 두 자리 수끼리의 차-를 각각 4, 6, 4문제 제시하여 세 차례에 걸쳐 풀도록 함으로써 아동의 비형식적 지식을 파악하고, 형식적 지식의 영향으로 인해 변화한 계산 전략을 비교 고찰하였다. 이를 통해 아동의 비형식적 지식에 포함된 개념적 요소와 절차적 요소를 추출하고 학교 수학에서 표준 알고리즘으로 다루어지는 형식적 지식과의 연계를 돕기 위한 교수학적 시사점을 얻고자 하였다.

• 한국수학교육학회지시리즈C:초등수학교육
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• 제25권4호
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• pp.377-394
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• 2022

초등학교 3~4학년군에서 무게를 지도하는 방식이 2015 개정 수학과 교육과정과 2015 개정 과학과 교육과정에서 상이하여, 초등학교 교사들과 학생들의 혼란이 야기된다는 비판이 제기되었다. 이에 본 연구는 사회적으로 사용된 지식이 가르쳐질 지식으로 교수학적 변환되는 과정에서 고려해야 할 사회적 인정성을 확인하고, 교수학적 의도에 따라 다르게 변환된 정도를 비교·분석하고자 하였다. 이를 위해 일상적 의미에서의 무게의 의미, 국제단위계에 따른 무게의 정의, 수학과 교육과정과 교과서에 구현된 무게, 과학과 교육과정과 교과서에 구현된 무게를 분석하였다. 이러한 분석을 통해서 가르칠 지식으로서의 무게를 어떻게 정의하고 가르칠 것인가에 관한 교수학적 관점을 도출하였다.

• 대한수학교육학회지:수학교육학연구
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• 제12권3호
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• pp.409-424
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• 2002

The historico-genetic principle has been advocated continuously, as an alternative one to the traditional deductive method of teaching and learning mathematics, by Clairaut, Cajori, Smith, Klein, Poincar$\'{e}$, La Cour, Branford, Toeplitz, etc. since 18C. And recently we could find various studies in relation to the historico-genetic principle. Lakatos', Freudenthal's, and Brousseau's are representative in them. But they are different from the previous historico- genetic principle in many aspects. In this study, the previous historico- genetic principle is called as classical historico- genetic principle and the other one as modern historico-genetic principle. This study shows that the differences between them arise from the historical views of mathematics and the development of the theories of mathematics education. Dewey thinks that education is a constant reconstruction of experience. This study shows the historico-genetic principle could us embody the Dewey's psycological method. Bruner's discipline-centered curriculum based on Piaget's genetic epistemology insists on teaching mathematics in the reverse order of historical genesis. This study shows the real understaning the structure of knowledge could not neglect the connection with histogenesis of them. This study shows the historico-genetic principle could help us realize Bruner's point of view on the teaching of the structure of mathematical knowledge. In this study, on the basis of the examination of the development of the historico-genetic principle, we try to stipulate the principle more clearly, and we also try to present teaching unit for the logarithm according to the historico- genetic principle.

• 대한수학교육학회지:학교수학
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• 제2권1호
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• pp.203-241
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• 2000

This study aims to suggest a model of task development for mathematics performance assessment and to develop performance tasks for the fifth graders in the primary school on the basis of this model. In order to achieve these aims, the following inquiry questions were set up: (1) to develop open-ended tasks and projects for the fifth graders, (2) to develop checklists for measuring the abilities of mathematical reasoning, problem solving, connection, communication of the fifth graders more deeply when performance assessment tasks are implemented and (3) to examine the appropriateness of performance tasks and checklists and to modify them when is needed through applying these tasks to pupils. The consequences of applying some tasks and analysing some work samples of pupils are as follows. Firstly, pupils need more diverse thinking ability. Secondly, pupils want in the ability of analysing the meaning of mathematical concepts in relation to real world. Thirdly, pupils can calculate precisely but they want in the ability of explaining their ideas and strategies. Fourthly, pupils can find patterns in sequences of numbers or figures but they have difficulty in generalizing these patterns, predicting and demonstrating. Fifthly, pupils are familiar with procedural knowledge more than conceptual knowledge. From these analyses, it is concluded that performance tasks and checklists developed in this study are improved assessment tools for measuring mathematical abilities of pupils, and that we should improve mathematics instruction for pupils to understand mathematical concepts deeply, solve problems, reason mathematically, connect mathematics to real world and other disciplines, and communicate about mathematics.

• 한국수학교육학회지시리즈E:수학교육논문집
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• 제32권1호
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• pp.1-22
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• 2018

본 연구의 목적은 STEAM 수업에서의 멘토교사 경험이 예비수학교사들의 융합인재교육(STEAM) 교수 역량에 미치는 효과에 대해서 알아보는 것이다. 본 연구는 사범대학과 연계된 중학교 자유학기제 수학탐구 프로그램에 참여한 23명의 예비수학교사들을 대상으로 한 학기 동안 수행되었다. 예비수학교사들의 STEAM 교수 역량의 변화 및 멘토교사 프로그램의 효과를 알아보기 위하여 사전, 사후 STEAM 교수 역량 검사와 수업 일기 및 간담회 자료 분석 결과를 활용하였다. 연구 결과에 의하면, STEAM 수업에서의 멘토교사 경험은 예비수학교사들의 STEAM 교육에 대한 지식, 교과내용지식, 교수학습방법, 수업상황 및 환경 역량 함양에 매우 효과적이었다. 특히, 중학생들을 대상으로 이루어진 STEAM 수업에서의 현장 경험이 예비수학교사들의 STEAM 교육에 대한 이해 향상과 더불어 실천적 지식을 형성하는데 실질적으로 도움이 된 것으로 나타났다.