• Journal of the Korean School Mathematics Society
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• v.10 no.2
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• pp.263-288
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• 2007

The purpose of this study is to search the effective teaching-learning program by considering how affect on formation of the process-object perspective of linear function using Excel. In this study we analyzed function units in textbook and examined how Excel affect on the formation of the process-object perspective of linear function. Teaching experiment was based on qualitative case study and performed for five classes with five 8th graders. Data were gathered through observations, audio-taped interviews, video recording of the students 'work, students' worksheets, and detailed field notes. Findings indicate that exploration learning environment using Excel could supplement paper-and-pencil environment. We found that intuitive, dynamic, explorative, feedback skills via Excel can play the role of scaffolding supporting formation of process perspective object perspective of linear function.

• Journal of Educational Research in Mathematics
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• v.27 no.4
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• pp.663-678
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• 2017

Semiotic studies in mathematical education have been based on Saussure, Peirce, and Frege and many prior researches have explored the concepts in a perspective of semiotics. However, the relationship among semiotical elements and the formation and the evolution of a conception are still ambiguous and veiled in many aspects. This thesis is intended to show how a conception was formed and evolved by expression, which is an element of semiotics. In this process, I sought to partially illuminate the relationship among expressions, concepts, and objects.

• 한국정책학회보
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• v.21 no.1
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• pp.103-130
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• 2012

정책변화가 왜 발생하였는가? 그와 같은 정책변화에 어떠한 요인들이 작용하였는가? 또한 그와 같은 정책변화가 어떠한 과정을 거쳐서 발생하였는가? 본 연구는 정책변화의 복잡성을 체계적으로 설명할 수 있는 방법을 제시하고자 정책연구의 지배적인 패러다임인 객관적·과학적 연구방법에서 탈피하여 사회적 형성주의 관점에서 맥락, 문제정의 및 대상 집단의 사회적 형성이 정책변화에 어떠한 영향을 미치는가를 알아보고자 하였다. 이를 위하여, 본 연구는 문제정의 이론과 대상 집단의 사회적 형성 이론의 결합을 통하여 연구 모형을 구축하였다. 또한 이와 같이 구축된 모형에 의하여 정책결정자가 문제 정의와 대상 집단의 사회적 형성에 어떤 역할을 하며, 그 결과가 정책변화에 어떻게 반영되는지를 정책의 논리, 근거 및 메시지의 측면에서 양도소득중과제도를 대상으로 분석하였다. 마지막으로, 이러한 분석을 통하여 도출된 시사점에 대하여 논의하였다.

• Journal of the Economic Geographical Society of Korea
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• v.13 no.2
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• pp.196-218
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• 2010

This study is to investigate the development process and the structure of the machine and material industrial clusters in Yeongnam region, Korea. In theoretical analysis, it is proposed that the wide area industrial cluster has three type of development process and a duplicate (or multi-level) spatial structure. We can ascertain from the case study of industrial clusters in Yeongnam region that An wide machine and material industrial cluster has been formed in Yeongnam region and the cluster has the duplicate structure or multi-level structure.

• Proceedings of the KAIS Fall Conference
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• 2010.11b
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• pp.617-619
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• 2010

본 논문은 인류문화의 형성에서 가장 중요한 요인으로 작용하는 문자문화의 출현과 더불어 변천의 과정을 재매개의 이론의 관점에서 살펴보았다. 결국 문화형성 요인에 있어서 문자의 출현은 인류의 역사적 기반을 형성하는데 있어서 가장 중요한 역할을 수행하였으며, 다양한 시각성의 문제로 귀결된다. 더불어 문자의 출현에서부터 디지털 시대에 이르기까지 앞선 매체의 재매개를 통해서 발전되고 있는 점들은 괄목할만한 대상이다.

• The Bulletin of The Korean Astronomical Society
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• v.37 no.2
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• pp.102.2-102.2
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• 2012

이 연구의 목적은 거시적인 관점에서 NOS의 중요한 요소들을 강조한 Flow map(oh, 2011)를 이용한 명시적이고 암시적인 교육의 본성교육이 얼마나 이루어졌는가를 알아본다. 과학의 본성은 지식의 내용뿐만 아니라 지식이 어떻게 형성되었는가에 있다. 이러한 과학의 본성을 이해한다는 것이 현대의 과학의 중요한 목적중의 하나인 과학적 소양을 얻는 것이다. 이를 구체적으로 실현하는 교수 모형으로 가장 중요한 이론의 생성과 실험에 의한 확증과 이론의 확증을 미시적인 관점으로 연구를 전개하였다. 따라서 먼저 Kuhn(1996)의 과학철학 이론과 NOS를 통한 Flow map 개발에 이론적 배경이 된 과학의 본성의 정의, 과학의 본성에 대해 합의된 핵심 요소들, Kuhn(1996)의 과학철학 이론을 바탕으로 한 Oh(2011)가 제안한 Flow map의 구조를 알아본다. 연구방법은 귀추(abduction)를 통한 가설의 생성과정과 확증을 보여주는 Oh(2012)의 자연과학의 추리과정을 이용하여 충북대학교 천문우주학과에서 자연과학캠프에 참여한 고등학생들을 대상으로, "Galileo의 흑점발견과정"으로부터 현대의 태양의 흑점 모형을 이해하도록 한다.

• Journal of Korean Elementary Science Education
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• v.43 no.2
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• pp.219-232
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• 2024

This study aims to determine the perspectives of pre-service elementary school teachers on the science curriculum in the fourth industrial revolution era. In this study, 128 pre-service elementary school teachers were asked to express their perspectives on the Saber-toothed Tiger Curriculum through photovoice activities. The resulting images were classified into three types: conservative, progressive, and radical perspectives. The number of both conservative and progressive perspectives was similar and high, whereas the number of radical perspectives was l ow. Those who had conservative perspectives on the Saber-toothed Tiger curriculum regarded "Inquiry" as the basis of the science curriculum, which should be maintained regardless of the time period and environment. Similarly, older teachers believed that this curriculum was based on eternal truth, which should be protected. Those who showed progressive perspectives on the Saber-toothed Tiger curriculum regarded a progressive person as someone succeeding to the blood of "New fist," and they showed positive attitudes toward AI-based education such as coding and meta-verse, regarding these practices as part of the teaching and learning method that could replace the existing inquiry-based education. Those who showed radical perspectives on the Saber-toothed Tiger Curriculum assumed critical attitudes toward the rapidly changing political circumstances of science education and criticized conflicts between different social classes formed through progressive curriculum. Based on these results, this study found that pre-service elementary school teachers needed to consider the science curriculum from several different perspectives rather than just one.

• Journal of Educational Research in Mathematics
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• v.23 no.2
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• pp.213-235
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• 2013

The purpose of this study is to analyze how the teaching activities which used EXCEL influence the specialized high school underachieved students. They have difficulties in making use of various representations for better understanding of function. EXCEL is helpful for learning function because it enables the students to use real life materials in math learning as well as formulates Tabular, Algebraic and Graphical which represent function. Furthermore, the students in specialized high school also have the experience of using EXCEL while studying other subjects. For that reason they have no burdens and fears on using EXCEL in learning activities. Utilizing EXCEL in the classroom gives an expectation that it helps to have interests on studying function and prepare for the next learning in the end. Research classes were conducted in a group of five students who have different hopes of career and a variety of mathematical interests. Though the students couldn't transfer Algebraic to Graphical in the diagnostic evaluation, they could resolve the problem of connections between Graphical, Tabular and Algebraic in the process perspectives, and could also express graphical representation by linking object perspectives with process perspectives. Therefore, they solved the connection problem of Tabular, Algebraic and Graphical in the object perspectives. As a result, the students could make transitions between Algebraic and Graphical in object perspectives through the classes applying EXCEL. Consequently, teaching the students with underachievement utilizing EXCEL enables them to recover their interests on math and it helps them to complete their following curriculum.

• Journal of The Korean Association For Science Education
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• v.20 no.3
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• pp.455-467
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• 2000

The purpose of this study was to investigate the characteristics of formative assessments practiced in middle school science teaching from a constructivist perspective. In order to examine the practices of formative assessments in science teaching, 7 science classes were observed and video-taped for each of 2 instructions. We also interviewed the teachers and 3 students per each class with semi-structured questions. The findings indicated that 3 types of formative assessments were generally used in science teaching; planned, interactive, and transitional from planned to interactive. Teachers tended to assess students' personal, social, and scientific developments through formative assessments. The assessment of scientific development was the most frequent pattern and was classified into the assessments of content, process, and context. However, formative assessments concerning content covered in class were dominant. The processes of formative assessments consisted of three interdependent stages; getting informations from students, judging their responses, and giving feedbacks to them. The types of questions and feedbacks used were also influenced by the extent of interactions between the teachers and the students.

• School Mathematics
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• v.12 no.1
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• pp.79-95
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• 2010

The purpose of this study is to examine into how the mathematically gifted cope with ambiguity when they are encountered to learn via resolving ambiguity. In this study 6 gifted students are asked to resolve the ambiguity. Participant in this study appeared to experience the need of mathematical justification and the flexible change of perspective. The gifted have constructed unified mathematical knowledge by making a relation between two incompatible perspective in the process of resolving the ambiguity. We suggest that dealing with ambiguity in mathematics class can be a good opportunity for enhancing the gifted student mathematics education.