• School Mathematics
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• v.19 no.2
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• pp.319-343
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• 2017

In this study, we hope to reveal specialized content knowledge(SCK) and its features necessary to analyze student's errors and difficulties about the concept of irrational numbers. The instruments and interview were administered to 3 in-service mathematics teachers with various education background and teaching experiments. The results of this study are as follows. First, specialized content knowledge(SCK) were characterized by the fixation to symbolic representation like roots when they analyzed the concentration and overlooking of the representations of irrational numbers. Secondly, we observed the centralization tendency on symbolic representation and the little attention to other representations as the standard of judgment about irrational numbers. Thirdly, In-service teachers were influenced by content of students' error when they analyzed the error and difficulties of students. Lately, we confirmed that the content knowledge about the viewpoint of procept and actual infinity of irrational numbers are most important during the analyzing process.

• Journal of The Korean Association For Science Education
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• v.40 no.6
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• pp.583-594
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• 2020

In this study, the existing concept of density has a limitation in providing the cause of phenomena, and the concept of buoyancy poses a problem because it has many misconceptions and requires an overly difficult concept to understand quantitative calculation, so we suggest an explaining method as process viewpoint introducing the principle of lever. The new method of explanation has been proposed using the lever as visual tool to reveal the gravity as the fundamental principle and process viewpoint. As a result, teachers stayed on many alternative concepts and less than half of the teachers were aware that density was related to gravity. In addition, they recognized it as matter viewpoints, but there is a meaningful conceptual change after intervention(p<.000). Also, they evaluated that the new method is better able to recognize the principle and process viewpoint than the existing description method. Through this, we can confirm the educational value of explaining method as process viewpoint introducing the principle of lever.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.7
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• pp.467-473
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• 2019

The purpose of this study is to present the scale of the overall influence by way of investigating how much any sub - elements of middle school teachers' distributed leadership influences any sub - elements of teacher efficacy and teaching commitment. First, there was no statistically significant difference in perceived level on distributed leadership according to the background variables of middle school teachers, but on average, it was shown to be high in female teachers, common teachers, over 21-year-career teachers and private school teachers. Second, there was a statistically positive correlation between distributed leadership and teacher efficacy or teaching commitment. Teacher efficacy showed a higher positive correlation than teaching commitment. Third, the study statistically showed that distributed leadership overall has influence on teacher efficacy and teaching commitment(41%). In conclusion, the study revealed a meaningful positive correlation between sub - elements of distributed leadership and sub - elements of teacher efficacy or teaching commitment, specially self-regulating efficacy, confidence of sub-elements of teacher efficacy, and school love of sub - elements of teaching commitment were positively explained according to the sub - elements of middle school teachers' distributed leadership. The explanatory power of the sub-elements of the distributed leadership on the teacher efficacy and the teaching commitment was 27% in the school situation, 28% in the leadership of the school principal, 28% in the leadership of the teacher, and 28% in the teacher interaction.

• Journal of the Korean School Mathematics Society
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• v.16 no.1
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• pp.187-200
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• 2013

This study, as part of the research on mathematics teacher knowledge analyzed the differences in understanding and familiarity on geometric knowledge of middle-high school teachers. Through this study, survey was carried out using a questionnaire and examination for 80 middle-high school teachers. As the result, differences between familiarities about believing in knowing about the proposition, and actually understanding why the proposition is established, was big. These results can provide us implications on the education of teachers and pre-service teachers of middle-high school.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.10
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• pp.4902-4909
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• 2013

The purpose of this study was to investigate the influence of early childhood teachers' emotional regulation style and teacher efficacy to their burnout. The data was collected by questionnaires method from 157 early childhood teachers in Gyeongsangbuk-do and Ulsan city. The instruments were Scale for Emotional Regulation Styles, Teachers' Sense of Efficacy, and Early Childhood Teachers Burnout Scale. The results of the study were as follows: Early childhood teachers' emotional regulation style and teacher efficacy meaningfully influenced to their burn out. This means early childhood teachers who had higher avoidant/distract regulation style showed higher their burnout and who had higher personal teacher efficacy showed lower their burnout. This research offers further study the influence variables to burnout and find out the effective method of emotional regulation and to enhance teacher efficacy.

• Journal of the Korean earth science society
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• v.41 no.2
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• pp.194-207
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• 2020

The purpose of this study is to identify the types and characteristics of elementary school pre-service teachers revealed in the process of resolving the change of lunar phases, which emphasizes the context of actual observation, and to provide suggestions for areas to be considered in the elementary school teacher training program. To this end, we analyzed the 30 pre-service teachers' explaining the observable lunar phases, and the main research results are as follows. First, the phase change of the moon was often explained by introducing the timetable for each phase of the moon rather than based on observation of the phenomenon and scientific reasoning. Second, an alternative concept of the type that the moon is invisible when the sun rises or that the moon can always be observed has been identified. Third, there was a case of explaining that the time and orientation for observing the moon can be observed regardless of the position of the sun or when observing the sun. Also, the date of observing the moon was assumed to be approached by assuming the lunar calendar. Based on the above results, pedagogical implications were discussed.

• The Journal of the Korea Contents Association
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• v.8 no.12
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• pp.449-456
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• 2008

The purpose of this study was to study the student cognition toward the subject of physical education and toward the method of teaching in the class. For the statistical measurement, the population has been chosen as the fifth and sixth grade 319 students(160 male; 159 female) from four different elementary schools in Seoul, Korea. In terms of the teaching method and management of students, the results show that they agree with controlled participation in class and appreciate teachers ability such as explanation, skill demonstration, knowledge, evaluation, maintaining order and participating class. However, there were no statistical difference male and female except for teacher's explanation. This study clearly indicates that the students want more affirmative and cooperative class environment and they expect to be evaluated not only by skill itself, but also by class participation and activity in their physical education class. The cognition and preference toward the class between male and female students did not show any difference in this study. After all, Teachers need to have more understanding, more compassion and more sensitivity towards their elementary students for interesting, effective and affirmative class.

• The Journal of the Korea Contents Association
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• v.18 no.7
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• pp.38-48
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• 2018

The purpose of this study was to identify various factors that could possibly influence special teachers' adoption intention towards robot-based education and to see how well those factors predict special teachers' adoption intention. To do this, questionnaire items were selected and reconstructed based on preceding research relating to Technology Acceptance Model(TAM). The survey participants consisted of 623 special school teachers, representing various types of special students and levels of their schools. Questionnaires with unfaithful responses were excluded, and a total of 590 questionnaires were analyzed. Data analysis was carried out through Exploratory factor analysis and stepwise multi-regression analysis. According to the results of study, factors that influence special teachers' acceptance intention towards robot-based education are perceived ease of use, perceived usefulness, personal innovation, and social influence. Also, the most decisive factors affecting special teacher's acceptance intention were perceived usefulness and perceived ease of use. These factors directly influenced special teachers' acceptance intention.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.3
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• pp.1424-1435
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• 2014

The purpose of this study was to investigate the causal relationship among job stress, teaching efficacy belief, and organizational commitment for early childhood teachers. Besides, the current study examined the mediating effect of teaching efficacy belief on the relationship between job stress and organizational commitment. The data were gathered through the questionnaires from 500 kindergarten and nursery teachers who are located in D metropolitan city. Among them, the total of 426 subjects were used for analysis from recovered 442. The results indicated that job stress was negatively correlated with teaching efficacy belief and organizational commitment for early childhood teachers. Teaching efficacy belief significantly had a positive relation with organizational commitment. Moreover, teaching efficacy belief turned out to have a partial mediating effect on the relationship between job stress and organizational commitment. This study has its significance in that it looked at the job stress as a predictor variable to explain the organizational commitment, the positive viewpoint by turning away from the early childhood teachers' burnout, and provided the potential for the environmental intervention by confirming the mediating effect of teaching efficacy belief.

• Journal of The Korean Association For Science Education
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• v.34 no.4
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• pp.349-357
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• 2014

The purpose of this study is to consider the implications of science experiment in class and to seek a direction for its improvement. For this purpose, Science textbooks, teachers' cognitions, and classroom activities have been analyzed to find out how many and what kind of levels of inquiry elements are included in those. In this study, 22 teachers have participated in the questionnaire to investigate their perception about experiment class, and the two instruction cases in two classes of 9th grade have also been analyzed. Results show that most of the textbooks have included questioning, evidence collecting, explanation of phenomena, and connection with existing scientific knowledge. But the elements of communication and justification have been few. Most levels of the inquiry are teacher-led. Although the teachers thought communication and justification are important, their classroom activities does not coalesce with their thoughts. The students mostly spend their time with connecting evidence, they hardly explain the phenomenon based on the proofs as the results of experiment, and the activities of connection with the existing scientific knowledge, and communication and justification.