• 한국수학교육학회지시리즈A:수학교육
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• 제55권1호
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• pp.91-106
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• 2016

The aim of this study was to analyze characteristics of teachers' knowledge about reductio ad absurdum. In order to achieve the aim, this study conducted didactical analysis about reductio ad absurdum through examining previous researches and developed a questionnaire with reference to the results of the analysis. The questionnaire was given to 34 high school teachers and qualitative methods were used to analyze the data obtained from the written responses by the participants. This study also elaborated the framework descriptors for interpreting the teachers' responses in the light of the didactical analysis and the data was elucidated in terms of this framework. The specific features of teachers' knowledge about reductio ad absurdum were categorized into five types as a result. This study raised several implications for teachers' professional development for effective mathematics instruction related to reductio ad absurdum.

• 한국수학교육학회지시리즈D:수학교육연구
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• 제9권3호
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• pp.285-294
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• 2005

The author has been teaching with an instructional module consisting of many mathematical concepts, based on designs formed by personal names or words to arouse students' interesting in learning mathematics. This module has been growing since it was first used as a supplementary lesson for calculus students. Now it consists of concepts that connect with mathematical topics such as number sense, algebraic thinking, geometry, and statistical reasoning, as well as other subjects such as art and quilt design. With its content we can provide our students the basic mathematical knowledge needed for further study in their own fields. In this article, we will demonstrate the latest development of this instructional module, which makes connections between mathematical knowledge and the design of personal quilt patterns. We will exhibit a 'Quilt of Nations' which consists of the designed quilt blocks of different countries, such as USA, Japan, Taiwan, Korea and others, as well as a quilt design using the abbreviation of this seminar. Then we will talk about how the connections are built, and how to design these mathematically rich, uniquely created, beautifully designed, and personalized quilt block patterns.

• 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.

• 한국수학교육학회지시리즈D:수학교육연구
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• 제2권1호
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• pp.21-39
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• 1998

The article examines four activities whereby the human face of geometry may be promoted in mathematical teaching at the upper secondary level. The activities deal with the historical, epistemological, structural and applicative issues of geometric knowledge.

• 한국수학교육학회지시리즈D:수학교육연구
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• 제14권2호
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• pp.173-194
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• 2010

This study examines the differences and similarities of mathematics teachers' subject matter knowledge among England, the Chinese mainland and Hong Kong. Data were collected from a ten-item test in the SKIMA subject matter audit instrument [Rowland, T.; Martyn, S.; Barber, P. & Heal, C. (2000). Primary teacher trainees' mathematics subject knowledge and classroom performance. In: T. Rowland & C. Morgan (eds.), Research in Mathematics Education, Volume 2 (pp.3-18). ME 2000e.03066] from over 500 participants. Results showed that participants from England performed consistently better, with those from Hong Kong being next and then followed by those from the Chinese mainland. The qualitative data revealed that participants from Hong Kong and the Chinese mainland were fluent in applying routines to solve problems, but had some difficulties in offering explanations or justifications.

• 한국수학교육학회지시리즈E:수학교육논문집
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• 제29권4호
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• pp.661-685
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• 2015

본 연구는 수학교사의 전문성을 신장시킬 수 있는 구체적인 가능성을 탐색하는 연구로, 다항식의 해법에 대한 수학교사의 대수 내용지식을 선정하고, 선정된 내용지식을 바탕으로 수학교사의 자립연수를 위한 학습 자료를 개발하였다. 개발된 학습 자료는 수학교사들에게 제공되었으며, 학습 자료가 자립연수에서 활용 가능한지, 수학교사들이 이해 가능한지 등에 대해 검사지로 조사하였고, 연수 방법 및 내용에 대해서도 설문을 하였다. 교사들의 대답을 분석한 결과, 개발된 학습 자료는 자립연수의 활용 가능성, 교사들의 이해 가능성, 연수 방법에 대해 긍정적인 결과를 얻었다.

• 대한수학교육학회지:수학교육학연구
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• 제12권4호
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• pp.473-491
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• 2002

This article analyzes mathematics education from dialectical materialism acknowledging the objectivity of knowledge. The thesis that knowledge is objective advances to the recognition that knowledge will be internalized, and an idea of zone of proximal development(ZPD) is established as a practice program of internalization. The lower side of ZPD, i.e. the early stage of internalization takes imitation in a large portion. And in the process of internalization the mediational means play an important role. Hereupon the role of mathematics teacher, the object of imitation, stands out significantly. In this article, treating the contents of study as follows, I make manifest that teaching and learning in mathematics classroom are united dialectically: I hope to findout the method of teaching-learning to mathematical knowledge from the point of view that mathematical knowledge is objective; I look into how analysis into units, as the analytical method of Vygotsky, has been developed from the side of mathematical teaching-learning; I discuss the significance of mediational means to play a key role in attaining the internalization in connection with ZPD and re-illuminate imitation. Based on them, I propose how the role of mathematics teachers, and the principle of organization to mathematics textbook should be.

• 대한수학교육학회지:학교수학
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• 제6권4호
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• pp.313-324
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• 2004

수학교육은 이제 국민대중교육, 교양교육으로서의 수학교육의 이념을 재발견하여 수학교육의 본래의 모습을 회복해야 할 시점에 와 있다. 오늘날 우리가 학교에서 가르치는 수학 지식은 어떤 성격의 지식이며 우리는 그러한 지식을 가르침으로써 인간을 어떤 상태로 만들려고 하는가\ulcorner 본고에서는 수학교육 사상의 뿌리를 탐색해 봄으로서 수학이라는 지식을 배우는 요한 목적은 실용성을 넘어 수학이라는 지식을 통하여 인간과 만물 이면에 있는 현상의 세계를 지배하는 실재를 깨달아 가도록 하는 인간교육의 구현에 있음을 밝히고, 그러한 이념을 오늘날 국민교육으로서의 수학교육이 우선적으로 지향해야 할 방향으로 제시하였다.

• 한국수학교육학회지시리즈D:수학교육연구
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• 제12권2호
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• pp.85-108
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• 2008

In this study, we created, implemented, and evaluated the impact of proportional reasoning authentic investigative activities on the mathematical content and pedagogical knowledge and attitudes of pre-service elementary and middle school mathematics teachers. For this purpose, a special teaching model was developed, implemented, and tested as part of the pre-service mathematics teacher training programs conducted in Israeli teacher colleges. The model was developed following pilot studies investigating the change in mathematical and pedagogical knowledge of pre- and in-service mathematics teachers, due to experience in authentic proportional reasoning activities. The conclusion of the study is that application of the model, through which the pre-service teachers gain experience and are exposed to authentic proportional reasoning activities with incorporation of theory (reading and analyzing relevant research reports) and practice, leads to a significant positive change in the pre-service teachers' mathematical content and pedagogical knowledge. In addition, improvement occurred in their attitudes and beliefs towards learning and teaching mathematics in general, and ratio and proportion in particular.

• 한국수학교육학회지시리즈E:수학교육논문집
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• 제26권1호
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• pp.109-135
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• 2012

수학 수업에서 요구되는 교사 지식을 '교과 내용 지식', '학습자 이해 지식', '교수 학습 방법 및 평가 지식', '수업 상황 지식'으로 상정하고, 수업 평가 및 교사 지식과 관련된 여러 선행 연구들에 의거하여 본 연구자는 교사 지식 요소 각각에 대한 수업 평가 영역 및 기준 마련을 위한 연구를 수행해 왔다. 본고에서는 지금껏 본인에 의해 수차례 수행된 연구 결과들을 신중히 재검토하여 보다 일관성 있고 체계적으로 수정 보완하고자 하였다. 이때, 각각의 교사 지식에 대한 교사 자신의 자기평가 방법에 따라 측정 용이한, 즉 실제적 활용 가치를 신중히 고려함은 물론, 특히 '수업전', '수업 중', '수업 후'의 상황을 모두 반영한 수학 수업 평가 기준을 새로이 마련하고자 하는데 중점을 두었다. 이처럼, 본고의 연구 결과를 활용하는데 있어서 교사는 수업 전, 수업 중, 수업 후 상황에 국면하게 되고, 교사 지식은 이러한 상황 모두에 요구되나, 실제의 수업 상황에서 모든 교사 지식에 대한 수업 평가 기준을 '동시에' 모두 고려하여 평가, 진단하는 것은 쉽지 않을 일이다. 이에 따라, 교사 자신 및 동료들이 해당 수업에 따라 요구되는 특정의 교사 지식 및 특정의 수업 진행 상황(수업 전, 수업 중, 또는 수업 후)을 선정하여 이에 국한, 집중하여 평가하도록 해야 할 것이다.