• ETRI Journal
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• v.41 no.2
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• pp.242-253
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• 2019

We devise a layer-wise hint training method to improve the existing hint-based knowledge distillation (KD) training approach, which is employed for knowledge transfer in a teacher-student framework using a residual network (ResNet). To achieve this objective, the proposed method first iteratively trains the student ResNet and incrementally employs hint-based information extracted from the pretrained teacher ResNet containing several hint and guided layers. Next, typical softening factor-based KD training is performed using the previously estimated hint-based information. We compare the recognition accuracy of the proposed approach with that of KD training without hints, hint-based KD training, and ResNet-based layer-wise pretraining using reliable datasets, including CIFAR-10, CIFAR-100, and MNIST. When using the selected multiple hint-based information items and their layer-wise transfer in the proposed method, the trained student ResNet more accurately reflects the pretrained teacher ResNet's rich information than the baseline training methods, for all the benchmark datasets we consider in this study.

• Research in Mathematical Education
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• v.13 no.1
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• pp.63-73
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• 2009

This paper reports on student, parent, and teacher perspectives of the characteristics of the mathematically gifted. The data are extracted from a two-year qualitative study that examined multiple perspectives, school policy documents and program provision for 15 mathematically gifted and talented students aged from 10 to 13 years. The findings have implications for identification and program provision.

• Journal of the Korean earth science society
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• v.29 no.1
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• pp.78-90
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• 2008

In most classrooms, teachers talk more than students. Teachers have been thought to be knowledge-donors and students have been thought to be knowledge-acceptors, so teacher-talks were thought to be more important than student-talks. But student-talks are very important to the students: not only to the students who speak out their opinions or answer to the questions given to them, but also to the others who say nothing in the class. Many students in Korea are not so fond of speaking out something to all the class, so some teachers are using a strategy: to say something as if he for she) is a student in the classroom. What teachers talk are not the words of the teacher-talks. They are only talked by the teachers, but they function like student-talks. To study this type of talks are needed to help both teachers and students but there are not much research about this. So in this paper we a) name it Pseudo Student Talk (PST), b) define it as 'a kind of talks that are not talked by students of the class but its functions are very similar to the student-talks', c) classify PST in 'EBS 2005 science class for 7th grade' according to types of student talks (categorized by Lemke, 1990), and d) show the usage of each kind of PST.

• Journal of The Korean Association For Science Education
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• v.16 no.4
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• pp.401-409
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• 1996

In this study, the perceptions of science classroom climate were investigated for 360 elementary and middle school students in mixed classes. The instrument used was an adapted version of the Student Perception Questionnaire (SPQ), which consists of five elements-Participatory Climate, Personalized Interaction, Student Assertiveness, Positive Teacher, and Negative Teacher. The results indicated that the gender differences in the perceptions of the Participatory Climate and the Positive Teacher were not significant for middle school students. However, the differences were found to be significant in the perceptions of the Negative Teacher, the Personalized Interaction and the Student Assertiveness, which measure the climate for the individual student. On the other hand, elementary male and female students did not significantly differ in the perceptions of science classroom climate except one item on the Participatory Climate. Educational implications are discussed.

• Research in Mathematical Education
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• v.24 no.3
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• pp.201-228
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• 2021

Teacher noticing has been termed consequential to teaching because what you see and do not see impacts decisions made within the classroom. Further, how a teacher responds to student thinking depends on what a teacher sees in student thinking. Within this study we sought to understand what teachers noticed within an engineering lesson and the decisions made as a result of that noticing. Findings indicate that student teachers and cooperating teachers drew on their pedagogical knowledge for decisions, rather than taking up the integrated content of student thinking and understanding. These findings serve as a guide for the experiences needed to engage in the complex work of teaching or, more specifically, implementing engineering into instruction through a responsive teaching frame.

• The Journal of the Korea Contents Association
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• v.21 no.11
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• pp.224-233
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• 2021

The aim of this study was to describe how a teacher used technologies to improve underserved student's learning in a low-resourced rural elementary classroom and provide implications for teachers' use of technology. The in-depth case study was conducted in a one-student classroom setting that isolated the fifth grader from social and collaborative learning opportunities. The qualitative data was collected in forms of classroom observation field notes, teacher interviews, student interviews and student's reflection journals. Findings are as follows: First, technology partakes an import role in a one-student classroom to support student's collaborative learning. Second, to overcome a digital divide, the teacher created a technology-enhanced environment with alternative methods of her own and supplemented teacher-created resources. Third, the teacher used technologies to support adaptive instruction based on student's needs.

• Journal of Korean Elementary Science Education
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• v.34 no.1
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• pp.15-31
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• 2015

The purpose of this study was to investigate elementary student teachers' conceptions about the mechanism of the greenhouse effect, the greenhouse gases, the global warming, and their learning experiences of the greenhouse effect and the global warming. Participants were 82 student teachers in their second year of studies (science education: n=28, not science education: n=27) and in their fourth year of studies (science education: n=27). The open-ended questionnaire was used to examine the teachers' spontaneous ideas depicted by their drawings and/or writings. The results of this study are as follows: First, the student teachers' scientific response rate about key concepts related to the mechanism of the greenhouse effect was low (6.1%~28.0%); Second, although there are various greenhouse gases, it was only carbon dioxide that the student teacher's response rate was more than 80%; Third, only 17.1% of the student teachers clearly distinguished the greenhouse effect and the global warming; Fourth, there was a tendency that the student teacher group in the fourth year of studies and science education showed higher scientific response rate about the concepts than the other two groups.

• Journal of the Korean Society of Clothing and Textiles
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• v.28 no.5
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• pp.591-602
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• 2004

This research examines the attributes of the Korean costume culture inherent in the expression of "-like" by focusing on the professional roles implied in the style of clothes. Based on a random sampling, the sample was comprised of 315 male and female college students who reside in Seoul and Gyeonggi area. The results were as followed: 1. Subjects preferred the blouse as the most "female student-like" upper wear. The female students recognized the Y-shirts as the "male teacher-like" upper wear while the male picked the Y-shirts for this category. For the "student-like" sleeve length, the female selected the cap sleeves and the three-quarter sleeves for the female and selected the short sleeves for the male. Subjects preferred the Peter Pan and the sailor collars for the "female student-like" category and selected the shirt collars as the most "male teacher-like" and "male student-like" style. 2 Subjects perceived the A-line and the flared skirts as the "female student-like" dresses. For the lengths of skirts, subjects agreed that the above-knee. the below-knee and the midi length were all proper for female teachers. For the length of pants, subjects selected the 9/10 as the most "female teacher-like" style. 3. Subjects selected black, white, light purple and beige as the preferred colors for female teachers. Subjects chose white and yellow as the most "female student-like" colors and picked the colors, navy blue, light blue and blue, as the "male-like" and "male teacher-like" colors.

• Journal of The Korean Association For Science Education
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• v.32 no.9
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• pp.1443-1451
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• 2012

This study aims to investigate the gaze patterns of two expert and two novice teachers in one hour of lecture type class. Teachers recruited from the same middle school conducted the class each, wearing an eye-tracker. Gaze rate and gaze movement pattern were analyzed. The scene where teachers faced in the classroom was categorized into three zones; student zone, material zone, and non-teaching zone. Student zone was divided into nine areas of interest to see the gaze distribution within the student zone. Expert teachers showed focused gaze on student zone while novice teachers' gaze rate was significantly higher at the non-teaching zone, compared to expert teachers' one. Within student zone, expert teachers' gaze spread to the rear areas, but novice teachers' one was narrowly resided in the middle areas of the student zone. This difference in gaze caused different eye movement pattern: experts' T pattern and novices' I pattern. On the other hand, both teacher groups showed the least gaze rate onto the left and right front areas. Which change is required to teachers' gaze behavior and what must be considered in order to make effective teacher gaze in the classroom setting were discussed.

• (The) Korean Journal of Educational Psychology
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• v.28 no.1
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• pp.23-39
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• 2014

The goal of this study was to examine the relationship among students' personal variables(Korean language abilities, self-efficacy, student-teacher attachment relationships), teacher variable(perceptions of multi-cultural education) affecting on multi-cultural students' school adjustment. Structural equation modeling was performed to test the mediating role of self-efficacy and student-teacher attachment affecting multi-cultural students' school adjustment. 336 elementary students and their matching 264 elementary school teachers were participated for this study. The model fit for this study model was acceptable, =280.024, df=98, CFI=.930, RMSEA = .074. The results revealed that teacher's perceptions on multi-cultural education significantly related with student-teacher relationships. However, Korean language ability did not directly affect the school adjustment for multi-cultural background students. That is, self-efficacy and student-teacher relationships mediated between Korean language ability and school adjustment. Moreover student-teacher relationships seem to be the key mediating factor between other research variables and school adjustment. Further considerations and future directions based on results were discussed.