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초등 교사들의 온라인상에서의 수업자료 공유에 대한 사례연구
서경혜 ( Kyoung Hye Seo ),최유경 ( You Kyung Choi ),김수진 ( Su Jin Kim ) 한국초등교육학회 2011 초등교육연구 Vol.24 No.2
수업시간에 교과서와 교사용 지도서 외에 활용할 만한 자료가 많지 않다는 문제가 계속해서 제기되어 왔는데, 최근 교사연구회나 교사학습공동체 등을 통한 교사들의 자발적인 해결 노력이 일고 있다. 특히 온라인상에서 교사들이 수업자료를 서로 교류 공유하는 사례가 주목을 끌고 있다. 그러나 교사들이 온라인상에서 어떤 자료를 어떻게 교류 공유하고 있는지에 대해 알려진 바가 많지 않다. 본 연구는 온라인상에서 이루어지는 교사들의 수업자료 공유 실태를 조사하는 데 목적을 두었다. 이를 위하여 인디스쿨 온라인 교사공동체를 사례로 선정, 인디스쿨에서 교사들이 어떤 자료를 교류 공유하고 이 자료들은 어떤 특징을 띠는지 탐구하였다. 그리고 그 결과를 토대로 교사들의 수업 향상에 시사하는 바를 고찰하였다. 이를 통해 궁극적으로는 현장 교사들의 수업자료에 대한 요구를 파악하고 적절한 지원방안을 모색함으로써 교사들의 수업 향상 노력에 일조하고자 하였다. In recent years, increasing number of teachers have participated in online teacher communities and shared their instructional materials in order to improve their teaching. However, little has been known what kinds of instructional materials teachers share online. The present study explored teachers` sharing of instructional materials in online teacher communities. For this purpose, Indischool, an online teacher community, was selected and what kinds of instructional materials were shared in indischool online teacher community was examined. The findings showed that, first, teachers shared a variety of instructional materials including PowerPoint presentation files, multimedia materials, student learning activity sheets, exercise sheets, and so on. Second, teachers` instructional materials focused on how to deliver the textbook contents to students. In particular, the instructional materials effective to draw students` attention were popular among teachers. Third, teachers` instructional materials were mostly finished products so that teachers could use them immediately without further revision or modification. Further, most of them were one-shot use. These features of instructional materials seemed to reflect the circumstances of elementary school teachers who taught more than 10 subject matters and different grades almost every year. Based on these findings, how to respond to the teachers` needs for instructional materials and support teachers` efforts to improve their teaching was discussed.
Antioxidant and neuroprotective activities of Sasa borealis extracts
Min Hye Kang(강민혜),Yun Jeong Ji(지윤정),Su Ji Choi(최수지),Seung Eun Lee(이승은),Je Hun Choi(최재훈),Gwi Yeong Jang(장귀영),Kyung Hye Seo(서경혜),Hyung Don Kim(김형돈) 한국약용작물학회 2021 한국약용작물학회 학술대회논문집 Vol.2021 No.1
Background : The Sasa borealis (SB), a species of bamboo, is a medicinal plant. It is known that SB has diverse biological activities like anti-diabetic, anti-obesity, anti-inflammatory, etc. This study was performed to investigate the antioxidant and neuroprotective activities of SB. Methods and Results : Sasa borealis (SB) aerial parts were extracted using distilled water and 70% ethanol respectively, producing SB water extract (SBW) and SB 70% ethanol extract (SBE). Antioxidant components, such as total phenolic contents (TPC) and total flavonoid contents (TFC), of the extracts were determined and antioxidant activities of the extracts were measured by in vitro assays including 2,2’-azino-bis(3-ethylbenzothiazoline-6-sulfonic acd) (ABTS) and 2,2’-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity. The intracellular reactive oxygen species (ROS) levels in neuronal cells were detected by 2’,7’-dichlorofluorescin diacetate (DCF-DA) assay. While TPC of SBE was higher than SBW, TFC of SBW was higher than SBE. In ABTS<sup>+</sup> and DPPH radical scavenging assay, SBE showed higher scavenging activity than SBW. And all SB extracts (SBW, SBE) significantly reduced the H2O2-induced ROS production in neuronal cells. Conclusion : Sasa borealis (SB) water and ethanol extracts have good antioxidant activities and ameliorated the H2O2-induced ROS production in neuronal cells. This result indicates that SB extracts can be promising candidates for further researches designed to treat and manage neurological disorders.