• 한국수학교육학회지시리즈A:수학교육
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• 제46권4호
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• pp.493-502
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• 2007

What is a foundational element of plane geometry? Isn't it possible to constitute the contents of plane geometry from that element? In this paper, we suggest a view point that triangle is a foundational element of plane geometry. And take some examples of reconstruction of usually given contents and mathematical activity centered on the triangle in plane geometry.

• 대한한의학방제학회지
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• 제22권2호
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• pp.87-103
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• 2014

Objectives : Herbal formulas are complicated to analyze and difficult to compose because of its mixed, complex features. So we discussed about how to compose herbal formulas effective and efficient by analyzing various effectiveness of each herbal extracts. Methods : To evaluate the effectiveness of herbal formula, anti-oxidative and anti-inflammatory effectiveness were mathematically analyzed. DPPH, superoxide anions, Nitric Oxide scavenging activity was measured to evaluate the effectiveness of 7 herbal extracts. And next, cytotoxic activity of extracts on RAW 264.7 cells were measured using MTS assay. To asses anti-inflammatory effect, nitric oxide and $PGE_2$ production were measured. Based on these anti-oxidative and anti-inflammatory experiment result, mathematical analyzation were carried out with constOptm function, and determined efficacy-maximizing ratio. Results : This mathematical analysis based formula showed significantly outstanding effectiveness than other formulae. And estimated tendency of anti-inflammatory effectiveness was matched with real effectiveness. Conclusions : So, mathematical analysis can be available to evaluate and estimate the effectiveness of herbal formulae.

• 한국수학교육학회지시리즈D:수학교육연구
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• 제17권1호
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• pp.1-14
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• 2013

Stochastic phenomena induce us to construct a probability model and structure our thinking; corresponding models help us to understand and interpret the reality. They in turn equip us with tools to recognize, reconstruct and solve problems. Therefore, various implications in terms of methodology as well as epistemology naturally flow from different adoptions of models for probability. Right from the basic scenarios of different perspectives to explore reality, students are occasionally exposed to misunderstanding and misinterpretations. With realistic examples a multi-faceted image of probability and different interpretation will be considered in mathematical modelling activities. As an exploratory investigation, mathematical modelling activity for probability learning was elaborated through semiotic analysis. Especially, the coherence structure in mathematical modelling discourse was reviewed form a semiotic perspective. The discourses sampled from group activities were analyzed on the basis of semiotic perspectives taxonomical coherence relations.

• 한국수학교육학회지시리즈E:수학교육논문집
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• 제18권2호
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• pp.79-92
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• 2004

This paper offers an analysis of how students reasoned with the dynamic parameter time to support their mathematical activity and deepen their understandings of mathematical concepts. This mathematical thinking occurred as they participated in a differential equations class before, during, and instruction on solutions to linear systems of differential equations. Students participated in the following identified mathematical practices related to parametric reasoning during this time period: reasoning simultaneously in a qualitative and quantitative manner, reasoning by moving from discrete to continuous imaging of time, and reasoning by imagining the motion. Examples of this reasoning are provided in this report. Implications of this research include the possibility that instructional activities can build on this reasoning to help students learn about the mathematics of change at the middle school, high school, and the university.

• 한국수학교육학회지시리즈D:수학교육연구
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• 제20권1호
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• pp.11-19
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• 2016

Investigating students' lived mathematical experiences presents dual challenges for the researcher. On the one hand, we must respect that students' experiences are not directly accessible to us and are likely very different from our own experiences. On the other hand, we might not want to rely upon the students' own characterizations of what constitutes mathematics because these characterizations could be limited to the formal products students learn in school. I suggest a characterization of mathematics as objectified action, which would lead the researcher to focus on students' operations-mental actions organized as objects within structures so that they can be acted upon. Teachers' and researchers' models of these operations and structures can be used as a launching point for understanding students' experiences of mathematics. Teaching experiments and clinical interviews provide a means for the teacher-researcher to infer students' available operations and structures on the basis of their physical activity (including verbalizations) and to begin harmonizing with their mathematical experience.

• 한국수학교육학회지시리즈A:수학교육
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• 제62권1호
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• pp.35-55
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• 2023

본 연구는 무리수 개념의 수학 오류 찾기 활동에서 학생의 인식뿐 아니라, 오류 활용에 관한 학생의 학습 태도와 수학적 담론 수준의 변화를 초래하는 교사의 발문 전략을 살펴보는 데 목적이 있다. 이를 위해 133명의 중학교 학생을 대상으로 오류 찾기 개인별 활동, 모둠 활동과 추가 면담을 수행하여, 학생의 인식과 학생의 학습 태도와 수학적 담론 수준의 변화를 위한 교사의 발문 전략을 분석하였다. 연구 결과, 학생들의 인식은 무리수의 기호 표상과 소수 표상에 집중하며 수직선 위의 무리수의 존재성은 인식하지만 도형을 활용한 수직선 표현에는 어려움을 겪는 경향이 있었다. 또한 학생의 학습 태도와 수학적 담론 수준의 변화를 촉진하기 위해 교사의 유도적-탐구적 발문 전략의 중요성을 관찰할 수 있었다. 본 연구는 수학 교수·학습에서 오류의 활용 방법을 구체화하고, 수학 오류 찾기에서 교사의 발문 전략을 정교화하였다는 점에서 가치가 있다.

• 한국수학교육학회지시리즈A:수학교육
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• 제51권4호
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• pp.455-469
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• 2012

Given the importance of mathematical connections in instruction, this paper analyzed the objects and the methods of mathematical connections according to the lesson flow featured in 20 elementary lessons selected as effective instructional methods by local educational offices in Korea. Mathematical connections tended to occur mainly in the introduction, the first activity, and the sum-up period of each lesson. The connection between mathematical concept and procedure was the most popular followed by the connection between concept and real-life context. The most prevalent method of mathematical connections was through communication, specifically the communication between the teacher and students, followed by representation. Overall it seems that the objects and the methods of mathematical connections were diverse and prevalent, but the detailed analysis of such cases showed the lack of meaningful connection. These results urge us to investigate reasons behind these seemingly good features but not-enough connections, and to suggest implications for well-connected mathematics teaching.

• 한국수학교육학회지시리즈A:수학교육
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• 제57권4호
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• pp.371-391
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• 2018

The purpose of this study is to analyze manifestation examples and effects of group creativity in mathematical modeling and to discuss teaching and learning methods for group creativity. The following two points were examined from the theoretical background. First, we examined the possibility of group activity in mathematical modeling. Second, we examined the meaning and characteristics of group creativity. Six students in the second grade of high school participated in this study in two groups of three each. Mathematical modeling task was "What are your own strategies to prevent or cope with blackouts?". Unit of analysis was the observed types of interaction at each stage of mathematical modeling. Especially, it was confirmed that group creativity can be developed through repetitive occurrences of mutually complementary, conflict-based, metacognitive interactions. The conclusion is as follows. First, examples of mutually complementary interaction, conflict-based interaction, and metacognitive interaction were observed in the real-world inquiry and the factor-finding stage, the simplification stage, and the mathematical model derivation stage, respectively. And the positive effect of group creativity on mathematical modeling were confirmed. Second, example of non interaction was observed, and it was confirmed that there were limitations on students' interaction object and interaction participation, and teacher's failure on appropriate intervention. Third, as teaching learning methods for group creativity, we proposed students' role play and teachers' questioning in the direction of promoting interaction.

• 한국콘텐츠학회논문지
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• 제10권4호
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• pp.447-457
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• 2010

미술작품이나 건축물에 수학 원리가 내재해 있다. 중등학교 학생들이 미술작품에서 이러한 원리를 찾는 일은 중요하다. 하지만, 미술작품이나 건축물에 내재한 수학 원리를 찾는 것 자체만의 학생 활동은 미술교육 본연의 목적을 달성하기 어렵다는 것이다. 그러므로 미술 교육의 목적을 달성하기 위해서는, 미적 체험과 작품 감상을 통하여 학생들 스스로 미술작품에서 수학 원리를 찾고, 이 원리를 응용한 새로운 작품을 구성하고, 감상하고, 표현하는 활동이 필요하다는 것이다. 이러한 관점에서, 본 논문에서는 수학 원리가 내재한 몇 몇 미술작품이나 건축물을 조사하였다. 그리고 학생 스스로 미술작품에서 수학 원리를 찾고, 이 원리를 이용하여 새로운 작품 구성 활동 능력을 기대할 수 있는 프로그램 모델을 구성하였다. 또한, 수학 원리가 내재한 Escher의 작품을 예로 들어 프로그램에서의 교사활동과 학생활동을 가상적으로 구성하였다.

• 대한수학교육학회지:학교수학
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• 제13권3호
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• pp.423-446
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• 2011

학교수학에서 정적분과 치환적분법의 개념은 확률밀도함수의 도입, 연속확률변수의 기댓값, 정규분포의 표준화와 관련하여 수학적 연결성을 가진다. 그러나 개정교육과정의 '미적분과 통계 기본', '적분과 통계' 과목의 교육과정해설서와 검인정 교과서 및 익힘책에서 적분단원과 통계단원 사이의 수학적 연결성 고려가 어려움을 발견하였다. 본 연구는 학교수학에서 확률밀도함수의 도입, 연속확률변수의 기댓값, 정규분포의 표준화에 대하여 적분단원과의 수학적 연결성을 고려한 지도방안 마련을 목적으로 한다. 세개념에 대한 학생대상 실태조사와 개정교육과정의 교육과정해설서, 교과서, 익힘책, 그리고 국내 외 통계학(확률론) 도서(국내 13종, 국외 22종)의 내용을 비교하였다. 이를 바탕으로 세 개념에 대한 지도내용을 개발하여 실제 수업에 적용해보았고, 교육과정개정이나 교과서의 내용구성 변화에 대한 시사점을 발견하여 그 결과를 제언하였다.