• School Mathematics
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• v.16 no.4
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• pp.763-782
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• 2014

The purpose of this study is to investigate mathematics content knowledge(MCK) of pre-service teachers about the area of a circle. 53 pre-service teachers were asked to perform four tasks based on the central ideas of measurement for the area of a circle. The results of this study are as follows. First, pre-service teachers had some difficulty in describing the meaning of the area of a circle. Quite a few of them didn't recognize the necessity of counting the number of area units. Secondly, pre-service teachers had insufficient content knowledge about the central ideas of measurement for the area of a circle such as partitioning, unit iteration, rearranging, structuring an array and approximation. Lastly, few pre-service teachers understood the concept of actual infinity. Most students regarded the rectangle as the figure having the approximation error instead of the limitation from rearranging the parts of a circle.

• Journal of Korea Entertainment Industry Association
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• v.14 no.2
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• pp.131-139
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• 2020

This study intended to analyze the early childhood education freshmen's academic interest. For this study relationship pre-service early childhood teacher's playfulness and play teaching efficacy. The study subjects were 145 early childhood education students in third grade at K-college in Deagu. They answered the survey regarding playfulness scale and play teaching efficacy scale. The collected data were analyzed by frequency analysis, descriptive statistics, pearson correlation and multiple regression analysis using SPSS 18.0 program. The study finding are as follows. First, the average of playfulness and play teaching efficacy were near at the intermediate-level. Second, playfulness and play teaching efficacy were significantly correlated. Third, when examining the relative effect of pre-service early childhood teacher's playfulness on play teaching efficacy, cheerfulness and improvisation is influential factor in play teaching efficacy.

• Journal of The Korean Association For Science Education
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• v.26 no.1
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• pp.68-87
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• 2006

The aim of this study was to understand the components that influence the mental models of preservice elementary teachers on the astronomical phenomena of seasons of the year and lunar phases of the month. For this, participants were selected from a university of education. Data was collected from a paper-pencil test and individual interviews with the participants. The results of this study showed that the preservice teachers had apparent synthetic mental models, and that the 'Distance Theory' and 'Occlusion Theory' had the greatest effect on their mental models. Furthermore, it was found that preservice elementary teachers' initial mental models of 'astronomical phenomenon' had their origin in personal belief sets (specific theory) related to 'astronomical phenomenon'. It was on these belief sets that they interpreted their observations and cultural information with the constraints of a naive framework of physics. The structures and possible sources for overcoming these synthetic mental models were also discussed in this paper. Lastly, implications for preservice elementary teacher education were presented.

• Journal of the Korean Chemical Society
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• v.46 no.3
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• pp.279-286
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• 2002

The purpose of this study was to investigate undergraduate students' preconception about the needed knowledge to understand organic reactions based on electron flow and undergraduate students' ability that understand fundamental chemical reaction based on electron flow, and was to offer pertinent teaching and learning method. For this study, 18 sophomores that majored in chemistry education of H University, were sampled. Test papers were newly developed that based on previous research. Undergraduate students' response was classified and reasons of the response were qualitatively analyzed by interview. According to the results of this study, it was found that undergraduate students had good understanding on the concept about the electron configuration of atoms and on the concepts about the needed knowledge to understand chemical reactions based on electron flow. But they didn't apply the concepts to the fundamental chemical reaction. Therefore, teaching and learning strategy that apply the needed concepts to understand chemical reactions based on electron flow to chemical reactions should be developed.

• Journal of The Korean Association For Science Education
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• v.32 no.2
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• pp.210-235
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• 2012

The purpose of this study was to develop a valid and reliable assessment tool for measuring scientific creative problem solving ability for middle school students. To achieve this aim, an assessment framework, four assessment items, and detailed rubrics for scientific creative problem solving were developed. The assessment framework had three dimensions (i.e. science contents, inquiry process, and thinking skills) and sub-elements for each dimension. The assessment items were tested with 320 middle school students in order to determine reliability, difficulty, and item discrimination. Science teachers and experts in science education checked the validity of the items and the rubrics. The results proved that the assessment tool was reliable enough to evaluate students' scientific creative problem solving skills.

• Journal of The Korean Association For Science Education
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• v.25 no.2
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• pp.133-145
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• 2005

The purpose of this study was to identify the relation between preservice teachers' philosophical views on science and types of responses to alternative hypotheses. To identify preservice teachers' philosophical views on science, the extraterrestrial impact theory and the volcano-greenhouse theory, alternative hypotheses related to dinosaur extinction were administered to 37 elementary preservice teachers and 52 secondary preservice teachers. Subjects were required to write down their ideas before and after reading the alternative hypotheses, and then the dimensions of responses to initial ideas were analyzed. To analyze, Soh's Philosophical Perspectives Prove(PPP) was used. The results of this study were as follows: (a) elementary and secondary preservice teachers' philosophical views on science corresponds to eclecticism, (b) the main types of responses were partial theory change in elementary preservice teachers and rejection in secondary preservice teachers, (c) preservice teachers' philosophical views on science and types of responses were eclecticism-partial theory change in elementary preservice teachers and eclecticism-rejection in secondary preservice teachers.

• 건강소식
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• v.35 no.8
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• pp.30-31
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• 2011

여성의 건강은 부인과 건강검진부터 시작된다. 미혼여성의 경우 산부인과 방문을 꺼려 검사로 예방할 수 있는 질환을 키워 수술까지 받는 경우도 있다. 이를 예방하기 위해 미혼여성에게 필요한 건강검진, 결혼 전 예비신부에게 필요한 건강검진, 40, 50대 폐경기에 필요한 여성들의 건강검진에 대해 알아봤다.

• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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• v.29 no.9
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• pp.46-51
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• 2000

펌프의 유지, 관리는 사용펌프의 용도, 취급액, 운전시간, 구조, 예비펌프의 유무등에 따라 차이점이 있으므로, 취급설명서 그리고 사용자의 관리체계에 맞추어 보수관리 지침을 세워 정기적인 검사 및 관리를 하는 것이 좋다. 여기서는 사용펌프의 유지 관리를 위한 기초지식 및 주의할 점, 관리 항목에 대하여 일반적인 관점에서 소개하고자 한다.

• Journal of Science Education
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• v.37 no.3
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• pp.538-549
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• 2013

This study investigated the preservice and inservice elementary teachers' perceptions on professionalism of teaching profession, professionalism of science teaching, and their self-efficacy on science teaching. For this study, 64 sophomore, 53 senior preservice teachers and 23 elementary teachers who were also graduate students were participated. The questionnaires consisted of 5 Likert scaled and descriptive items about the professionalism of teaching profession, professionalism of science teaching, and self-efficacy on science teaching. The results showed that some areas of the professionalism of teaching profession had significant differences between the grades in preservice teachers and/or inservice teachers. Most preservice teachers and teachers thought that they need to have professional ability, but not a few teachers thought it was not necessary to have professionalism of science teaching as a elementary teacher, even though their major was science education. The teachers who had higher perceptions on the needs of the professionalism of science teaching showed high self-efficacy on science teaching.

• Journal of the Korean School Mathematics Society
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• v.12 no.4
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• pp.545-562
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• 2009

Calculus is used in various parts of human life and the basis of social science such as economics and public administration. Yet that is still considered important in the field of science and technology only, and there have been a lot of disputes on that phenomenon. Fortunately, calculus is going to be taught as part of the academic high school second-year mathematics curriculum in and after 2010. Students who face calculus for the first time should be helped not to lose interest in differentiation learning, not to be apprehensive of it nor to avoid it. The purpose of this study was to examine the types of errors made by students in the course of solving differentiation problems in an effort to lay the foundation for differentiation education. A pilot test was conducted after generalized differentiation problems to which students were usually exposed were selected, and experts were asked to review the pilot test. And then a finalized test was implemented to make an error analysis according to an error type analysis framework to serve the purpose.