• Education of Primary School Mathematics
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• v.19 no.4
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• pp.277-289
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• 2016

Fraction is one of the concepts which are difficult to elementary school students. So, many researches about fraction were performed in mathematics education research. In special, fraction has so many subordinative concepts-proper fraction, improper fraction, mixed number. We have to concentrate on the conceptual understanding in teaching of fraction. In this case, a mixed number and improper fraction are concepts which can convert respectively. And there are methods that a mixed number and improper fraction can be converted. So, it's needed to analyze the converting methods in textbooks for getting the implication of teaching in this areas. In this study, I analyzed the Korean and foreign's textbooks. I certified the methods-using addition expression, using part-whole model in the textbooks. For the conceptual understanding, I suggested to use the fusion of the various part-whole fraction models and addition expression more than the algorithm in converting between a mixed number and improper fraction. It's reason that the use of models in converting between a mixed number and improper fraction is important for the relational understanding.

• Journal of Educational Research in Mathematics
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• v.9 no.1
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• pp.311-319
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• 1999

수학 교사의 지식은 교과내용 지식, 일반 교육학 지식, 교육학 내용 지식, 교육과정 지식, 학습자에 대한 지식, 교육적 내용에 관한 지식, 수학 교육 목표, 목적, 가치에 대한 지식으로 분류될 수 있다. 지금까지 이러한 수학 교사에 대한 지식 종류에 대한 학문적 연구는 뚜렷하게 체계적으로 연구되어지지 못하고 주로 저학년 학생 및 학습자 위주로 산발적인 연구가 진행되어 왔다. 수학교사가 지녀야할 지식은 수학 학습자인 학생들을 어떻게 효과적으로 가르치느냐에 가장 직접적인 영향을 미치는 것이므로 이에 따른 구체적인 조사 연구가 필요할 뿐만 아니라 교사교육 프로그램에 반영되어 효과적으로 능력있는 교사를 양성할 수 있도록 하여야겠다.

• Journal of The Korean Association For Science Education
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• v.33 no.6
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• pp.1219-1236
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• 2013

The purpose of this study was to investigate the association between subject matter knowledge (SMK) and pedagogical content knowledge (PCK) for science teachers. To this end, a total of 26 secondary Earth science teachers participated in this study and a concept diagnostic questionnaire and a lesson planning task of atmospheric pressure were devised to give an indication of participating teachers' SMK and PCK, respectively. The results of this study are summarized as follows: First, participating teachers showed a variety of SMK levels about atmospheric pressure. Second, teachers at high level of SMK focused on 'supplementary' and 'fundamental' curriculum contents for in-depth conceptual understanding, but teachers at low level of SMK, on the contrary, stressed 'applicative' curriculum contents. Third, teachers at high level of SMK grasped students' misconceptions and difficulties in learning atmospheric pressure far more concretely than teachers at low level of SMK. Lastly, teachers at high level of SMK showed a tendency to use learner-centered instructional strategy by utilizing students' prior knowledge, but teachers at low level of SMK were inclined toward teacher-directed concept explanation. Based on this study, some implications for effective science teacher preparation programs were also discussed.

• Journal of The Korean Association of Information Education
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• v.15 no.1
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• pp.11-22
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• 2011

The purpose of the research is examine the effect of STEM integration education using educatinal robot on academic achievement and subject Attitude of mathematics and science. The participants were 73 students of two classes, sampled from 6th graders of an elementary school. They were divided into a control group who learned a traditional mathematics and sciences education based textbooks and an experimental group who learned STEM integration education using educational robot during 12 sessions. The results are summarized as follows : First, there is a significant difference in academic achievement between two groups. STEM integration education using educational robot based group accomplished higher achievement than textbook based instruction group. Especially, post test analyzes results on the three factors of academic achievement, knowledge, understanding and adaptation, indicate statistically meaningful difference between two groups in understanding and adaptation area except knowledge area. Second, it shows that it greatly affected a positive influence on experimental group's attitude toward subjects in affective area. So we can expect STEM integration education using educational robot to be an alternative for stimulating children's higher learning interest on mathematics and science subject.

• School Mathematics
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• v.19 no.2
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• pp.289-317
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• 2017

This study aims to explore how Korean middle-school mathematics textbooks on functions provide students an opportunity-to-learn [OTL]. For this purpose, we investigate 3 textbooks in terms of mathematics content and practice, the level of cognitive demands of mathematical tasks, types of student responses, types of context-based tasks, and connections among the tasks. The findings from the data analysis suggest as follows: a) an opportunity-to-learn to connect procedures to functional concepts and new ideas of functions to the existing one is very limited; b) the textbooks seem to provide students an OTL to understand functions as definitions, rules and conventions and to experience repeatedly procedural executions through worked examples and mathematics tasks; c) students may not experience to explain their own ideas/thinking by using mathematical sentence or justify their own cognitive processes; and d) students can be exposed to get a sense of mathematics as a set of fragmented and isolated facts or procedures, rather than to encourage to expand and deepen their understanding of functions.

• 한국정보교육학회:학술대회논문집
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• 2011.01a
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• pp.147-151
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• 2011

Educational efforts in integrating various subjects which are closely related to one another have had positive results. Additionally, integrating subjects has shown to be more effective than teaching subjects independently. The purpose of this study is to propose, construct, and develop a theme-based integrated program that teaches elementary school student's subjects which are outside the regular curriculum such as electricity, electronics, programming, and energy by using Diki-3000. Thus, having considered the theoretical background of theme-based integrated program, elementary school subjects including home economics, science, social studies, and extracurricular activities have been analyzed and restructured into theme-based program. Students will learn about and familiarize themselves with these subjects by utilizing the Diki-3000 product. This program aims to improve students understanding of the aforementioned subjects by combining Diki-3000's strengths as an educational tool with the contents of theme-based integrated program. Moreover, the learning experiences gained from completing critical problem-solving activities which are beyond normal subject knowledge is expected to help develop learners' positive thinking skills.

• Journal of the Korea Convergence Society
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• v.9 no.10
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• pp.383-391
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• 2018

The Purpose of this study was to convergence factors which affect the subject of basic dental hygienics in some dental hygiene students. The questionnaire was conducted in 450 dental hygiene students who had completed clinical practice. The level of self-confidence of the students was significantly higher if the level of satisfaction with the subject of basic dental hygienics was higher (r=0.365). Also, the level of self-confidence was significantly higher if the satisfaction with the major was higher (r=0.320) and the level of satisfaction with the major was significantly higher if the level of satisfaction with the subject of basic dental hygienics was higher (r=0.314). This study is expected to be used as a basic material for the development of systematic and convergence programs related with basic dental hygiene in connection with clinical practice.

• The Science & Technology
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• no.9 s.460
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• pp.94-95
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• 2007

• 한국과학교육학회:학술대회논문집
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• 2008.08a
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• pp.95.1-95.1
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• 2008

• 한국과학교육학회:학술대회논문집
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• 2008.01a
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• pp.123.2-123.2
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• 2008