• Journal of The Korean Association For Science Education
• /
• v.32 no.7
• /
• pp.1187-1203
• /
• 2012

This study investigated the changes in teaching professionalism of beginning science-gifted education teachers through mentoring in the aspects of pedagogical content knowledge. We selected two beginning teachers whose teaching careers in science-gifted education were less than five years. The teachers planed, performed and reflected on science instructions for secondary science-gifted students through mentoring during nine class hours over three times respectively. We observed their instructions and analyzed the taped videos, the materials, the transcripts for in-depth interviews with mentees, and discussions between mentor and mentee, researcher's field notes by using the constant comparative method. This study revealed that the mentoring, although there were many limitations, positively changed the mentees' practical knowledge about the curriculum for science-gifted education, the instructional strategies for science-gifted education, the assessment in science-gifted education, the science-gifted students, and the science content. These results suggest that the mentoring will be useful in improving the teaching professionalism of beginning science-gifted education teachers and provide meaningful implications in finding the ways to use it effectively in science-gifted education.

• Journal of Life Science
• /
• v.26 no.8
• /
• pp.895-903
• /
• 2016

This study was carried out to discover the response of cucumber (Cucumis sativus L.) senescence- associated genes (SAGs) to several plant hormones in detached and developing cotyledon. Accordingly, a collection of cucumber SAGs were examined to characterize their gene expression response through semi-quantitative RT-PCR. Cotyledons were excised at day 14 after seed sowing from plantlets, then incubated in 100 μM each of IAA or zeatin solution for up to 4 days in light and darkness. They were collected at 2-day intervals and used for total RNA extraction and subjected to RT-PCR. Gene expression levels of several cucumber SAGs were significantly changed during the incubation period. More than five cucumber SAGs involving SAG 60 responded to the IAA and zeatin treatment. In the ethylene response study, cotyledons were exposed up to 10 days by ethylene gas. Most of the cucumber SAGs did not show immediate response to ethylene in green cotyledon. The exceptions were PCK, SAG 158, and SAG 288 genes, which responded after 1 day of exposure to green cotyledon, while ICL and SAG 281 revealed strong responses after 10 days of being exposed to yellowing cotyledon. These results suggest that several cucumber SAGs react actively in response to starvation or senescence against exogenously applied stimulus. This induced senescence response is able to understand the SAGs role in lipids and amino acids metabolism partly and function in organ senescence during development.

• Journal of Educational Research in Mathematics
• /
• v.19 no.4
• /
• pp.545-564
• /
• 2009

TPACK (Technological Pedagogical Content Knowledge) adds the technological knowledge to PCK (Shulman 1986), completing the combination of three kinds of knowledge, i.e. teacher's content knowledge (CK), pedagogical knowledge (PK), and technological knowledge (TK). In this study, I seek to design methodological ways to improve TPACK for preservice mathematics teachers by developing and analyzing team project-based classes with technology in a class of the first semester 2009 in a teacher's college in Seoul, South Korea. The goal of the team project is to design classes to teach mathematics with technology by selecting technology tools suitable for specific mathematical concepts or mathematics sections. In the early stage of the class in the college, the confidence levels among the preservice mathematics teachers were relatively low but increased in the final stage their mathematics teaching efficacy up to from 3.88 to 4.50. Also, the pre service mathematics teachers answered the team project was helpful or very helpful in developing TPACK; this result proves that lectures with technology which based on team project are excellent tools for the teacher to design classes with technology confidently. Considering the teacher's TPACK is one of the abilities to achieve the goals required in the information technology era, the preservice mathematics teachers are asked to plan and develop the lectures with technology, rather than just taught to know how to use technology tools or adapt to specific cases. Finally, we see that national-wide discussion and research are necessary to prepare customized standards and implementable plans for TPACK in South Korea.

• Journal of Science Education
• /
• v.45 no.2
• /
• pp.172-186
• /
• 2021

The purpose of this study is to analyze the science lesson plan of pre-service elementary teachers about condensation. Pre-service elementary school teachers in A national university of education was included in this study. Through the analysis of prior research and expert review, a framework for analysis of science lesson plan of pre-service elementary teachers was derived. The results of the using the analysis frame are as follows: First, the ability to apply the instructional model in the science lesson plan about condensation differences in pre-service elementary teachers need to be enhanced due to deviations, and teaching on the exact understanding of condensation-related concepts of pre-service elementary teachers is also needed. Second, there is also a deviation of pre-service elementary teachers in the beginning, development, and finishing composition of lesson course, so feedback should be supplemented. Third, in the sub-domain of lesson environment, there was a demand for specific know-how on the lesson environment. Therefore, support is needed for related PCK growth. Fourth, the sub-domain of lesson evaluation have a variety of perspectives on timing and subjects, and some missing about learning objectives in the composition of evaluation content are found to require complementary teaching. In order to improve this situation, it was found that there was a need to prepare conditions for improving science teaching professionalism of pre-service elementary teachers through in-depth discussions on the teaching methods and organization related to science education in the university of education course.

• Journal of the Korean School Mathematics Society
• /
• v.16 no.3
• /
• pp.583-600
• /
• 2013

In this paper, we study the recognition and fallacy of would-be in-service teachers about numbers with irrational exponent. We chose 51 secondary school teachers who are teaching mathematics in K metropolitan city and investigate their recognition and fallacy about the cases of irrational exponents of a positive rational and irrational exponents of a positive irrational number at the expansion of exponential law. We found following facts. First, in-service teacher's a percentage of correct answers differ depending on the type of numbers with irrational exponent. Second, in-service teachers decide their answer depending on intuition rather than logic. Third, in-service teachers decide their answer depending on exponential rather than base.

• The Mathematical Education
• /
• v.55 no.2
• /
• pp.171-192
• /
• 2016

As teachers' competency is evaluated based on their teaching performance. pre-service teachers need to have an opportunity to reflect on themselves by systematically analyzing and evaluating their own lesson planning and teaching performance through self-assessment. In this study, we aimed to examine what evaluation criteria for lesson planning and teaching performance pre-service mathematics teachers consider in the process of self-assessment. This study used a mixed-methods research design. To draw the self-evaluation criteria for lesson planning and teaching performance, pre-service self-reported assessments were analyzed using qualitative analyses. In addition, descriptive statistics were used to investigate the pre-service teachers' distribution across the criteria and check the ratio of pre-service mathematics teachers for each element. As a result, it was disclosed that pre-service mathematics teachers considered eight elements in self evaluating their own lesson planning and teaching performance. In addition, we found that pre-service mathematics teachers tended to consider Pedagogical Content Knowledge (PCK) more than Subject-Matter Knowledge (SMK). Moreover, the results of this study provide educational implications for the curriculum in the pre-service teacher's education program.

• Journal of the Korea Society of Computer and Information
• /
• v.22 no.7
• /
• pp.141-152
• /
• 2017

As the importance of technology increases, so too does its use in various areas. In education, technology is often used. However, due to teachers' lack of knowledge about technology, they often remain at the level of simple utilization, without applying it to learning. Thus, there is a growing need for Technological Pedagogical Content Knowledge (TPACK), which enables teachers to have knowledge about technology and use it appropriately given the content. Although TPACK studies are underway in many subjects, they suffer from the limited functionality of the included technology. To solve this problem, in this study, the range of technology in TPACK was extended to programming, and a TPACK-P model was developed to teach this expanded TPACK to pre-service teachers. To verify the effectiveness of this model, the TPACK-P training program developed during the 15th classes was applied to 19 pre-service teachers. We used Park and Kang (2014) as a tool to measure these teachers' TPACK before and after treatment to observe any changes. The results showed that the TPACK-P education program showed statistically significant improvement in all areas except Pedagogical Content Knowledge(PCK). Compared with the ICT-based TPACK training program, which was administered to a control group, the TPACK-P training program proved to be more effective in the development of Technological Pedagogical Knowledge(TPK) and TPACK among pre-service teachers.

• Proceedings of The KACE
• /
• 2018.01a
• /
• pp.21-23
• /
• 2018

테크놀로지의 중요성이 증가함에 따라 다양한 영역에 테크놀로지가 활용되고 있다. 교육에서도 효과적인 학습을 촉진하기 위하여 테크놀로지를 도입하고 있다. 하지만 테크놀로지에 대한 교사의 지식 부족으로 인하여 맹목적인 테크놀로지 활용이 이루어지고 있다. 이러한 문제를 해결하기 위하여 TPACK 연구가 활발하게 진행되고 있으며, 김성원과 이영준(2017)은 프로그래밍을 도입한 TPACK-P 교육 프로그램을 개발하였다. TPACK-P 교육 프로그램은 예비 교사의 Technological Pedagogical Knowledge (TPK), Pedagogical Content Knowledge (PCK), Technological Pedagogical Content Knowledge (TPACK) 발달에는 효과적이었지만, Technological Content Knowledge (TCK)에는 영향을 주지 않았다. 본 연구에서는 이러한 문제를 해결하기 위하여 프로그래밍 기반 수업 사례 탐색 및 분석을 보완한 TPACK-P 교육 프로그램을 개선하였다. 개선한 TPACK-P 교육 프로그램이 예비 교사의 TPACK에 미치는 영향을 살펴보기 위하여, K 대학에 다니고 있는 예비 교사 20명을 대상으로 개선한 TPACK-P 교육 프로그램을 적용하였다. 예비 교사의 TPACK 변화를 살펴보기 위하여 박기철과 강성주(2014)의 TPACK 검사 도구를 사용하였다. 이러한 실험을 통하여 TPACK-P 교육 프로그램은 예비 교사의 TPACK 향상에 효과적인 것을 확인할 수 있었다. 또한, TPACK의 모든 세부 영역의 발달에 효과적인 것을 확인할 수 있었다. 본 연구에서는 단일 집단을 대상으로 개선한 교육 프로그램을 적용하였다. 향후 연구에서는 대조군을 설정하고, TPACK-P 교육 프로그램이 예비교사의 TPACK에 미치는 영향을 비교 분석하여야 한다.

• School Mathematics
• /
• v.17 no.2
• /
• pp.179-202
• /
• 2015

In this research, I explored how to apply the history of mathematics in teacher education and investigated the applicability of Chosun Sanhak (mathematics of Chosun Dynasty) as the program that enriched the mathematical knowledge for teaching of prospective elementary school teachers. This program included not only mathematical knowledge but also socio-cultural knowledge and connection knowledge. Prospective teachers participated in various mathematical activities such as explaining, reasoning and problem solving in this program. The effects of this program are as follows. Prospective teachers learned the subject matter knowledge(SMK) which was helpful in teaching basic concepts and skills of elementary mathematics. Next, this program produced the pedagogical content knowledge(PCK) to prospective teachers by giving ideas how to teach.

• Proceedings of The KACE
• /
• 2017.08a
• /
• pp.217-220
• /
• 2017

테크놀로지의 발전에 따라 교육에서도 테크놀로지를 도입하기 위한 움직임이 활발하게 진행되었다. 교육에서는 테크놀로지를 학생들이 학습 과정에서 겪는 문제점을 해결하기 위한 목적으로 활용하였다. 하지만, 교사들의 테크놀로지에 대한 전문성 부족으로 인하여, 교사들은 수업에 테크놀로지를 도입하는데 많은 어려움을 겪고 있었다. 테크놀로지를 기반으로 한 교사의 수업 전문성 발달을 위하여 테크놀로지 교수 내용 지식(TPACK)이 도입되었고, 교사의 TPACK 향상을 위한 연구가 많이 진행되었다. 최근에는 테크놀로지가 가진 한계점을 극복하기 위하여 새로운 테크놀로지 도구로써 프로그래밍이 주목받고 있다. 따라서 선행 연구에서는 프로그래밍을 기반으로 TPACK 교육 프로그램을 향상시키기 위한 교육 프로그램이 개발되었다. 본 연구에서는 김성원과 이영준(2017)에서 개발한 TPACK 교육 프로그램의 효과를 검색하기 위한 연구를 진행하였다. 교사에게 적합한 40차시의 TPACK-P 교육 프로그램을 개발하였고, 연구를 위하여 모집한 17명의 교사를 대상으로 교육 프로그램을 적용하였다. 또한, 교사의 TPACK 변화를 관찰하기 위하여 박기철과 강성주(2014)의 연구에서 개발한 검사 도구를 교육 프로그램 투입 전, 후에 실시하였다. 적용 결과, TPACK-P 교육프로그램을 통하여 교사의 TPACK은 통계적으로 유의미한 향상이 나타났다. 세부 영역에서는 Pedagogical Knowledge(PK), Technological Knowledge(TK), Technological Content Knowledge(TCK), Technological Pedagogical Knowledge(TPK), Technological Pedagogical Content Knowledge(TPACK)에서 통계적으로 유의미한 차이가 나타났다. 하지만, Content Knowledge(CK)와 Pedagogical Content Knowledge(PCK)에서는 통계적으로 유의미한 차이가 나타나지 않았다. 이러한 결과를 통하여 TPACK-P 교육 프로그램이 모든 영역은 아니지만, 테크놀로지와 관련된 지식과 교사의 TPACK 발달에 효과적인 것을 확인할 수 있었다. 본 연구에서는 TPACK-P 교육 프로그램을 통한 교사의 TPACK 변화를 검사 도구를 통하여 측정하였다. 후속 연구에서는 TPACK-P 교육 프로그램에 참여한 교사의 수업 전문성의 변화와 학교 현장에서 수업의 변화, 이에 대한 학생들의 반응을 측정하는 연구가 필요하다.