• The Mathematical Education
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• v.55 no.2
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• pp.233-249
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• 2016

In this study, we extracted the background meaning of the condition that four points lie on a circle, analyzed textbooks critically and proposed the orientation to improve the content in the textbook. As results, the condition has a realistic background meaning which is 'mathematical modeling of finding a fair location'. The condition has a mathematical background meanings which are 'a first complex situation distinguished from two points and three points', 'the condition described in the perspective of side and angle in order to overcome the disadvantages of the perpendicular bisectors context' and 'being possible to transfer more than five points'. However it is difficult to understand the reason why the condition is on four points in the current textbook. In addition, it is difficult to recognize the connectivity of a circumcenter of triangle. To overcome these problems, we proposed five orientations to improve the content in the textbook.

• Communications of Mathematical Education
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• v.18 no.3 s.20
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• pp.57-71
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• 2004

러시아는 오래 전부터 성공적으로 수학 경시대회를 운영해 오고 있기 때문에, 러시아의 수학 경시대회의 발생 배경, 초창기의 수학 경시대회의 정착 및 발전 과정에 대한 체계적인 분석은 우리 나라 수학 경시대회의 위상을 정립하고 앞으로의 발전 방향을 모색하는데 의미로울 것이다. 본 연구에서는 러시아의 대표적인 수학 경시대회의 하나인 모스크바 수학 경시대회의 발생 배경, 초창기 운영 방법, 수학 경시대회의 성격 및 목적, 수학 경시대회의 교육적 측면, 수학 경시대회와 연결된 수학동아리 활동을 체계적으로 분석하였다.

• Communications of Mathematical Education
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• v.10
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• pp.221-236
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• 2000

오늘날 우리의 교육은 교육과정에 나와 있는 내용의 구성에 대해서는 어떤 부분을 강조해야 하는가? 그리고 왜 강조해야 하는가?에 대해서 학생들에게 잘 전달하지 않은 채, 어려운 공식 ${\cdot}$ 원리 ${\cdot}$ 법칙 등의 유도와 문제풀이 등으로 인해 학생들은 점점 수학에 대해 흥미를 잃고 있다. 본 연구에서는 현행 고등학교 수학에서의 미분과 적분 단원의 내용 구성에 있어서 문제점을 살펴보고, 수학 학습이 학습자에게 좀더 의미 있는 활동이 되도록 미분과 적분 단원의 내용에 대한 바람직한 지도계열에 대해서 살펴보고, 지도시 특히 강조해야 할 점들을 대학수학에서의 이론적 배경을 토대로 살펴본다.

• Communications of Mathematical Education
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• v.14
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• pp.177-195
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• 2001

인간의 교수${\cdot}$학습은 본질적으로 뇌 기능과 많은 관련을 맺고 있기 때문에 뇌-기반 학습에서는 우리의 뇌가 최적으로 학습하는 방식에 기초해 접근을 시도한다. 지난 30년간의 뇌에 대한 연구는 교수${\cdot}$학습에 대해서 이용할 만한 많은 정보를 제시하고 있다. 많은 교육연구가들은 뇌 연구를 기초로 뇌가 최적으로 학습하는 뇌-친화적 환경을 도입하였고, Politano & Paquin(2000)은 현행교실에 실제로 이용 가능한 뇌-기반 환경을 창조하기 위한 기초로서 10가지 요소를 제시하면서 뇌-기반 학습에서 학습자는 자신에게 익숙한 학습감각을 가지고 있으며 그것을 통한 학습이 효과적임을 말하였다. 수학교육에서도 이와 같이 뇌-기반 학습을 배경으로 하는, 학습자의 학습감각을 고려한 교수${\cdot}$학습이 의미있다고 할 수있다. 본 연구에서는 뇌기반 학습의 의미를 고찰하고, 제 7차 교육과정이 실행되는 초등학교 4학년, 중학교 2학년, 고등학교 1학년에 교실에 대한 학습감각을 조사하였으며, 수학 교실에서 학습자의 학습감각을 고려한 수업활동을 제시하였다.

• The Mathematical Education
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• v.60 no.4
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• pp.529-542
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• 2021

The purpose of this research is to compare the mathematical beliefs that directly or indirectly affect the mathematics learning of Korean languge learners with those of non-Korean languge learners and identify the characteristics. To this end, an analytical comparative research was conducted through a questionnaire survey on perceptions of mathematics learning for 6th grade students of elementary school with different cultural and linguistic backgrounds in the same mathematics classroom. As a result of the analysis, Korean languge learners and non-Korean languge learners gave different meanings to learning mathematics, and they recognized various meanings of success in mathematics. In addition, the math learning ability of non-Korean learners was evaluated higher than that of Korean learners. Based on their positive beliefs, they decided how to resolve conflict situations with different problem-solving results. It will be necessary to prepare a teaching/learning plan that can fully implement multicultural mathematics education in the mathematics classroom where Korean language learners with different cultural and linguistic backgrounds belong. The results of this research can contribute to raising awareness of the need for follow-up researches to find ways to reduce the learning gap between Korean languge learners and non-Korean languge learners. It is expected that this research will contribute to understanding the perceptive characteristics of Korean language learners about learning mathematics and to prepare a plan to utilize them in mathematics lessons.

• School Mathematics
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• v.5 no.2
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• pp.167-189
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• 2003

Mental arithmetic has recently gained a higher profile in primary school mathematics. The study aims to reflect didactical background of mental arithmetic in number and operations curriculum for primary school mathematics. In order to attain these purposes, the present paper describes the meaning of mathematical literacy and didactical background of mental arithmetic on which have been laid emphasis in relation to mathematical literacy in many countries. Also it shows current suggestions for mental arithmetic instruction in Everyday Mathematics Project in USA, Numeracy Number Project in Great Britain, TAL project based on Realistic Mathematics Education in the Netherlands, and mathe 2000 project in German in order to gain practical ideas for teaching mental arithmetic. Furthermore, it discusses mental strategies of students and didactical models for improving mental arithmetic instruction based on the results of many researches. Under these theoretical foundations, it is analyzed how mental arithmetic is developed in our number and operations curriculum, focused on mental strategies and didactical models. Finally, implications for improving our mental arithmetic instruction are discussed.

• Journal for History of Mathematics
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• v.20 no.2
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• pp.19-32
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• 2007

This Paper aims to introduce Euler's life, works and thoughts, to show that it is his Christian worldview that enables his achievements. His life teaches us the lesson that examining philosophical base and historical background is crucial to understand mathematics or mathematicians, and that it is necessary to overcome given conditions and environments rather than expect better environments to reach meaningful achievements.

• Proceedings of the KIEE Conference
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• 2001.11b
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• pp.88-91
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• 2001

본 연구에서는 전력계동의 다이나믹스를 정확하게 표현할 수 있는 기계적 시스템인 등가역학 모델(Equivalent Mechanical Model: EMM)을 제안하고, 이를 기초로 확고한 수학적 해석을 통해 에너지 함수의 유도 방법을 체계화 하고 물리적 의미를 파악함으로써 에너지 함수를 이용한 시스템 해석에 대한 이론적 배경을 마련한다. 또한 시영역 모의법을 이용한 과도안정도 해석의 간접법에서 SI법중 Trapezoidal법에서의 오차를 줄일수 있는 알고리즘을 제시한다. 먼저 수학적 이론을 바탕으로 전력계통에 적용하여 상태변수를 업데이트 시킴으로써 Trapezoidal법에서보다 더 정확한 데이터를 얻고자 한다. 본 연구에서는 명확한 수학적 이론의 적용을 위해 1기 무한대 모선을 모델로 시뮬레이션 하였으며 결과의 비교분석을 위해 Runge-Kutta법에 의한 시영역 모의와 비교하였다.

• School Mathematics
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• v.13 no.3
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• pp.405-422
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• 2011

In this study, we consider the meaning of one-to-one correspondence through theoretical background under operation of matrix. On algebraic point of view, its significance is 'through one-to-one correspondence from a set with given structure, become a methods in order to induce an algebraic system in to a new set.' That is a key idea making isomorphic structure. Such process experiences necessity of mathematical fact, as well as the deep understanding of one-to-one correspon -dence. Also that becomes a base for develop a various mathematical concepts, such as matrix, exponential laws, symmetric difference, permutation and so on. This study help teachers and students to understand of mathematical concepts meaningfully and to facilitate teacher's professional development.

• Communications of Mathematical Education
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• v.35 no.4
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• pp.413-423
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• 2021

This study investigated the empty set which is one of the mathematical objects. We inquired some misconceptions about empty set and the background of imposing empty set. Also we studied historical background of the introduction of empty set and the axiomatic system of Set theory. We investigated the nature of mathematical object through studying empty set, pure conceptual entity. In this study we study about the existence of empty set by investigating Alian Badiou's ontology known as based on the axiomatic set theory. we attempted to explain the relation between simultaneous equations and sets. Thus we pondered the meaning of the existence of empty set. Finally we commented about the thoughts of sets from a different standpoint and presented the meaning of axiomatic and philosophical aspect of mathematics.