• East Asian mathematical journal
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• 제38권4호
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• pp.463-496
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• 2022

The purpose of this study is to analyze the mathematical creativity and computational thinking of mathematically gifted elementary students through a convergence class using programming and to identify what it means to provide the convergence class using Python for the mathematical creativity and computational thinking of mathematically gifted elementary students. To this end, the content of the nine sessions of the Python-applied convergence programs were developed, exploratory and heuristic case study was conducted to observe and analyze the mathematical creativity and computational thinking of mathematically gifted elementary students. The subject of this study was a single group of sixteen students from the mathematics and science gifted class, and the content of the nine sessions of the Python convergence class was recorded on their tablets. Additional data was collected through audio recording, observation. In fact, in order to solve a given problem creatively, students not only naturally organized and formalized existing mathematical concepts, mathematical symbols, and programming instructions, but also showed divergent thinking to solve problems flexibly from various perspectives. In addition, students experienced abstraction, iterative thinking, and critical thinking through activities to remove unnecessary elements, extract key elements, analyze mathematical concepts, and decompose problems into small components, and math gifted students showed a sense of achievement and challenge.

• 한국수학교육학회지시리즈D:수학교육연구
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• 제4권1호
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• pp.23-31
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• 2000

This research elaborated five components for pre-service mathematics teacher training: 1) Mathematical content knowledge, 2) Pedagogical content knowledge, 3) Pedagogical reasoning, 4) System of training, and 5) Mathematics teachers' beliefs. For the effect teaching, mathematics teacher program should be reformed. The key to improvement should be concerntrated on developing knowledge about effective teaching and translating it into algorithms those teachses can learn and incorporate in their planning prior to teaching. A theory of instruction should specify the most effective sequences in which to present the materials to be learned.

• 한국수학교육학회지시리즈D:수학교육연구
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• 제23권2호
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• pp.93-111
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• 2020

The purpose of this study was to examine mathematics teachers' perceptions of multicultural education. To achieve this goal, the study explored how 10 elementary mathematics teachers noticed multicultural content in a mathematics textbook. Building upon noticing framework (Jacobs, Lamb, & Philipp, 2010), we first examined teachers' attention toward multicultural content in a mathematics textbook. Then, we examined teachers' interpretation of the content. We employed a content analysis approach to examine the collected data. The results indicated that most mathematics teachers held a content integration perspective. Their view was that "multicultural education" referred to learning about the diverse cultures of different countries. Moreover, although they noticed some multicultural content in the textbook, they wanted to discuss them in superficially descriptive ways and avoid talking about social justice issues. Additionally, some teachers believed that mathematics is a culture-free subject. They argued that multicultural content should not be presented in mathematics textbooks. We also discussed uncommon themes, which were reported by only a few mathematics teachers.

• 한국수학교육학회지시리즈D:수학교육연구
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• 제26권4호
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• pp.291-310
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• 2023

In this paper, we propose a theoretical framework for Chinese high school mathematics teachers use new textbooks based on the work of Remillard (1999) and Chau (2014). Based on this framework, a multiple case approach was used to investigate how two high school mathematics teachers from Shanghai use new textbooks. The results suggest that in the curriculum mapping arena, both the novice teacher and the expert teacher often planned to appropriate the unit content, and sometimes planned to add supplemental content. When organizing the unit content, novice teacher always planned to follow the new textbook in sequence, while expert teacher often would follow the new textbook in sequence, but sometimes planned to rearrange the unit content. In the design arena, both the novice teacher and the expert teacher tended to appropriate the introduced tasks and definitions. The novice teacher often planned to appropriate the example problems and exercise problems, while the expert teacher often intended to flexibly use the example problems and exercise problems. In the construction arena, the novice teacher seldom adjusted the planned tasks; in contrast, the expert teacher adjusted the planned tasks more frequently. In the reflection arena, the novice teacher often thought she should improve the mathematics tasks, while the expert teacher almost always thought he needed to improve the mathematics tasks. The framework shown in this paper provides a tool to investigate how mathematics teachers use textbooks.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2002년도 추계학술발표회
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• pp.86-88
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• 2002

The mathematical model was proposed to simulate ozone transport and remediation in unsaturated soils contaminated with phenanthrene. Soil column experiments were also carried out to calibrate the mathematical model. The experimental results successfully matched with the modeling results in various soil conditions. The model proposed nondimensional fraction factor to reveal reactivity between phenanthrene and gas phase ozone and liquid phase ozone. From sensitivity analysis, the fraction factor and stoichiometric coefficient decreased as water content increased. Simulation results showed increased SOM content retarded the ozone transport and the phenanthrene removal due to increased ozone consumption.

• 대한수학회보
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• 제56권2호
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• pp.399-406
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• 2019

Let n be the spatial dimension. For d, $0<d{\leq}n$, let $H^d$ be the d-dimensional Hausdorff content. The purpose of this paper is to prove the boundedness of the dyadic strong maximal operator on the Choquet space $L^p(H^d,{\mathbb{R}}^n)$ for min(1, d) < p. We also show that our result is sharp.

• 대한수학교육학회지:학교수학
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• 제2권1호
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• pp.53-72
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• 2000

The purpose of this study is to review theoretically the meaning and importance of mathematical communication and to search effective teaching-learning materials to develop it. This study has the content on relation of learning & communication, the qualitative examination of student's response in some mathematical communication tasks and materials of teaching mathematical communication.

• 한국보육학회지
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• 제17권3호
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• pp.49-63
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• 2017

이 연구에서는 영유아교사의 수학적 태도와 수학교수효능감의 관계에서 조절효과를 가질 것으로 예상되는 변인으로 수학교과교육학지식을 선택하여 연구하였다. 영유아교사의 수학적 태도와 수학교수효능감의 관계에서 수학교과교육학지식의 조절효과를 알아보기 위해 수도권 및 강원도에 위치한 어린이집 및 유치원에 재직중인 교사 500명에게 질문지를 통한 연구를 실시하였다. 수학교수효능감의 측정을 위해 Luo(2000)의 도구를 정정희(2001a)가 수정, 번안한 영유아교사용 수학교수효능감 척도를 사용하였고, 수학적 태도의 측정을 위해 Smith(2000)의 도구를 번안하여 사용하였다. 수학교과교육학지식의 측정을 위해 홍희주(2012)가 개발한 수학교과교육학지식 측정도구를 표준보육과정 및 누리과정을 반영하여 수정하여 사용하였다. 수집된 자료는 IBM SPSS 21.0을 통해 중다회귀분석을 사용해 분석하였다. 연구결과, 영유아교사의 수학교과교육학지식은 수학적 태도와 수학교수효능감의 관계를 조절한다. 즉, 수학교과교육학지식 수준이 높을 경우 수학적 태도가 수학교수효능감에 미치는 긍정적인 영향을 더 강화할 수 있다. 이 연구는 수학교과교육학지식이 조절효과를 가진다는 점을 밝혀 영유아교사의 수학교수효능감 향상을 위한 교사교육 프로그램에서 다루어져야 할 내용들에 대한 근거를 제공할 것으로 기대된다.

• 대한수학교육학회지:수학교육학연구
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• 제22권4호
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• pp.557-580
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• 2012

미국의 수학교육과정 규준인 Common Core State Standards for Mathematics(CCSSM)은 이전의 규준에 비해 구별되는 특징을 지녔고, 특히 '수학적 실천' 규준 8가지는 '수학적 내용' 규준에 버금가는 주요 요소로서 각 학년의 지도 내용과 함께 매번 제시되면서 강조되고 있다. 그 구체적인 내용 설명이나 내용 규준 전체에 걸쳐 지도되어야 한다는 특징 등으로 볼 때 우리나라 2009 개정 수학과 교육과정의 신설 요소인 '수학적 과정'에 비견될 성질의 것이다. 그러나 CCSSM에 대한 우리나라의 선행 연구는 주로 내용 규준의 변화 및 비교에 초점이 있거나 심지어 과정 규준의 존재 자체를 간과하는 경우도 있다. 이에 본 연구는 CCSSM 및 그 적용의 확장을 위해 마련된 여러 가지 후속 자료를 수집하고 분석하여, 수학적 실천의 의미를 이해하는 데 목적이 있다. 나아가 수학적 과정과의 비교를 통해 우리나라 수학과 교육과정에 보강되어야 할 과정적 측면에 대한 검토와 더불어 수학적 과정을 효과적으로 적용하기 위한 방법에 대한 논의를 포함할 것이다.

• 한국수학교육학회지시리즈A:수학교육
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• 제55권2호
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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.