• Journal of Educational Research in Mathematics
• /
• v.20 no.2
• /
• pp.185-202
• /
• 2010

This study was designed to investigate the possibility that the optimization problem solving activities based on the instrumented CAS can have an influence on the sequence of mathematics curriculum in secondary mathematics education. Some optimization problem solving activities based on CAS were constructed and executed to eleventh grade(the penultimate year of Korean high school) 7 students for nine class hours. They have experienced using CAS in mathematics class for three months, but never learned calculus. The data which consists of classroom observations(audio and video taped) and post-unit interviews with students were analyzed. In the analysis, with CAS, students can highly deal with the applied optimization problems made up of calculus, cubic equation, solution of radical equation, and graph analysis which never learned. This result shows CAS may have an influence on the sequence of mathematics curriculum in secondary mathematics education.

• Journal of the Korean Chemical Society
• /
• v.58 no.3
• /
• pp.313-323
• /
• 2014

The purpose this research was to develop the practicum-affiliated coursework for pre-service chemistry teachers to enhance their instructional professionalism. The researchers developed the syllabus and the materials of the practicum-affiliated coursework and opened the class 'Practice of Chemistry Lesson' for the pre-service chemistry teachers who were expected to participate in the practicum. Semi-constructed individual interviews revealed that pre-service chemistry teachers thought the developed coursework, which linked science education theory and practice, helped them to develop educational connoisseurship about good science class and to be prepared practically to the practicum, and as the result, they could enhance their teaching ability. The result identified that the reconstruction of the practicum experience through the process of 5 steps of the curriculum could develop the instructional professionalism of pre-service chemistry teachers.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
• /
• v.16 no.2
• /
• pp.173-182
• /
• 2005

This review is a clinical and research update of recent literature related to childhood onset schizophrenia (with an onset of psychosis by age 12). Childhood onset schizophrenia(COS) is a rare disorder, but that may represent a more homogeneous patient population in which to search for risk or etiologic factors of schizophrenia. These overview data show that COS shares the same clinical and neurobiological features as later onset forms of the disorder. Compared with later onset schizophrenia, however, this subgroup of patients appear to have more severe premorbid neurodevelopmental abnormalities, more cytogenic abnormalies, poor outcome, and potentially greater family histories of schizophrenia and associated spectrum disorders. Future studies of this subgroup may provide important clues as to the genetic basis for schizophrenia and how gene products influence certain feature of the disease, such as age of onset and mode of inheritance.

• The Journal of Korean Association of Computer Education
• /
• v.18 no.3
• /
• pp.1-14
• /
• 2015

The aim of this paper is to explore and understand the gifted student's characteristics such as NetLogo programming patterns, attitudes, his/her interest in problems solving. Based on transcripts and coding video frames, we explored the meaningful scenes to come up with thinking patterns, NetLogo programming patterns, attitudes, behaviors on tasks such as drawing regular starlike shapes. This case study contrasts with two other students revealing their unique characteristics both in computational thinking patterns and coding activities. The participant reveals his own ways of finding a clue and elaborating it further for coming up with concise NetLogo coding. This paper provides cross-case discussion and future research direction on how to improve gifted education in terms of problem solving in creative ways.

• Journal of Elementary Mathematics Education in Korea
• /
• v.19 no.3
• /
• pp.387-408
• /
• 2015

The purpose of this research is to analyze the mathematical tasks of length measurement in two different perspectives, the level of cognitive demands and learning trajectories, and restructure the mathematical tasks so that the students' conceptual learning is promoted and students are able to have opportunities to think more broadly. Ten lessons with the restructured mathematical tasks were implemented for a class of 2nd grade elementary students. Also a qualitative and in-depth study was conducted with 4 students of the target group. The study shows that firstly, the restructured tasks requiring high level of cognitive skills, had positive effects in increasing the students' level of thinking and reasoning. Secondly, the tasks modified according to the learning trajectories of Szilag, Clements & Sarama(2013) in length measurement, have proven to promote students' concept learning and elaborate the students' level of thinking.

• Journal of the Korean earth science society
• /
• v.27 no.4
• /
• pp.364-373
• /
• 2006

The purpose of this study is to investigate inquiry levels in the laboratory practices of beginning middle school science teachers. For this research eight teachers were chosen among a pool of beginning teachers. Then four finalists were chosen individually by interviews. Topics associated with hands-on activity experiments were provided by the author. In order to analyze teaching-skill development, classroom observations were made under the same topic after one year. The inquiry levels of four novice teachers were confirmation or structured inquiry but the inquiry levels were not out of confirmation or structured inquiry levels when those compared to last year's one. This study contributes to the professional development of teachers and provides various informations for instructional development of beginning teachers.

• Journal of the Korean Chemical Society
• /
• v.44 no.3
• /
• pp.266-280
• /
• 2000

The purpose of this Study was to explore students' conceptual ecologies in the context of general chemistly learning. This study was implemented in the first semester of 1999 by natural study. We had nine voluntary participants. Data were collected from three semi-constructd interiews, and socio-cultural values. Among three categories, motivationa1 beliefs and socio-cultural values have more effcts rather than epistemology on the context of general chemistry learning, and three typical cases were presented as results of this study. We expect that results of this study will somewhat contribute to establish psychological and socio-cultural context of learning.

• Journal of Elementary Mathematics Education in Korea
• /
• v.15 no.2
• /
• pp.437-461
• /
• 2011

The purpose of this study was to examine the metacognition of mathematically gifted students in the problem-solving process of the given task in a bid to give some significant suggestions on the improvement of their problem-solving skills. The given task was to count the number of regular squares at the n${\times}$n geoboard. The subjects in this study were three mathematically gifted elementary students who were respectively selected from three leading gifted education institutions in our country: a community gifted class, a gifted education institution attached to the Office of Education and a university-affiliated science gifted education institution. The students who were selected from the first, second and third institutions were hereinafter called student C, student B and student A respectively. While they received three-hour instruction, a participant observation was made by this researcher, and the instruction was videotaped. The participant observation record, videotape and their worksheets were analyzed, and they were interviewed after the instruction to make a qualitative case study. The findings of the study were as follows: First, the students made use of different generalization strategies when they solved the given problem. Second, there were specific metacognitive elements in each stage of their problem-solving process. Third, there was a mutually influential interaction among every area of metacognition in the problem-solving process. Fourth, which metacognitive components impacted on their success or failure of problem solving was ascertained.

• Journal of Educational Research in Mathematics
• /
• v.27 no.3
• /
• pp.391-410
• /
• 2017

This study aims to analyze mathematically gifted students' characteristics of generalization and justification for a given mathematical task and induce didactical implications for individual teaching methods by students' learning styles. To do this, we identified the learning styles of three mathematically gifted 6th graders and observed their processes in solving a given problem. Paper-pencil environment as well as dynamic geometrical environment using Geogebra were provided for three students respectively. We collected and analyzed qualitatively the research data such as the students' activity sheets, the students' records in Geogebra, our observation reports about the processes of generalization and justification, and the records of interview. The results of analysis show that the types of the students' generalization are various while the level of their justifications is identical. Futhermore, their preference of learning environment is also distinguished. Based on the results of analysis, we induced some implications for individual teaching for mathematically gifted students by learning styles.

• Journal of the Korea Convergence Society
• /
• v.11 no.6
• /
• pp.289-296
• /
• 2020

This study uses the qualitative research method to describe the burnout experience in Mental Health Social Workers (MHSW) working in psychiatric hospitals. Data was collected and analyzed to identify the main themes from two in-depth interviews with four MHSWs who have been working in psychiatric hospitals for more than 5 years located in Seoul and Gyeonggi Province area. The results of the study show that burnout manifests as; 'not being recognized as professionals,' 'being skeptical of the role of social workers,' 'distancing oneself from patients and their family members,' and 'feeling realistic problems and limitations.' The results of this research are expected to be used as basic data to both understand and prevent the burnout experience of mental health social workers.