• 한국과학교육학회지
• /
• 제17권3호
• /
• pp.261-271
• /
• 1997

This study evaluates on students' understanding and misunderstanding of homeostasis, classification of animals and plants, and food production in plants, and analyzes the teacher factor as a possible source of students' misconception. A total number of 863 students and 47 biology teachers at the middle and high school were randomly selected. Students' conceptions and misconceptions were measured with concept evaluation statements (CES) which was translated into Korean by author. The CES was developed and validated by Simson and Marek (1988). Teacher's misconceptions were investigated the way in which teachers marked students' work. The supposed answer given to the teachers to mark was based on misconceptions held by students tested in concept evaluation statements. The results of this study are as follows : 1. 0% of 7th Grade students, 4.5% of 9th Grade students and 5.4% of 11th Grade students understood homeostasis. There was a significant difference at the level of students' understanding of homeostasis according to schools and gender(P<0.05). Many students had a tendency of understanding the conception of the homeostasis by experiences and unscientific use of everyday language rather than a scientific concept. 2. 0.4% of 7th Grade students, 3.1% of 9th Grade students and 2.9% of 11th Grade students understood classification of animals and plants. There was a significant difference at the level of students' understanding of classification of animals and plants according to schools and gender(P<0.05). Students classified animals and plants through personal experiences and observations instead of trying to classify through microscopic analysis of animals and plants cell. 3. 1.2% of 7th Grade students, 10.3% of 9th Grade students and 19.4% of 11th Grade students understood food production in plants. There was a significant difference at the level of students' understanding of food production in plants according to schools and gender(P<0.05). Students had a misconception that food production in plants was done by an absorption of nutrients from soil not by photosynthesis. 4. A large proportion of teachers surveyed in this study appear to have misconceptions about homeostasis (38.1%), classification of animals and plants (34.1%), food production in plants (40.4%). The male teachers had. more misconceptions than female teachers(P<0.05). However, they didn't show any significant differences according to schools and teaching experience(P<0.05). 5. According to the investigation of teachers' perception, 29.8% of the teachers acknowledged that they might be a cause for students' misconceptions. This study shows that 38.3% of teachers did not understand the analyzed biological concepts precisely. By comparing the data of students and teachers, it turned out that teachers participate in the students' misconceptions. And teachers themselves acknowledged that students' misconceptions could be caused by them. Therefore. teachers' right understanding of fundamental biological concepts should precede to students' biology education. New training programs for biology teachers seem to be urgent.

• 환경영향평가
• /
• 제15권6호
• /
• pp.357-372
• /
• 2006

The excessive land activities in farming can cause soil erosion, inundation by a flood, and fallow. So far land evaluation has been analyzed using the land use limitation derived from the excessive land activities. This study was done for evaluating the agricultural fields by using 3 land use limitations, inundation potential, soil erodibility potential, and fallow potential. The study area is Ibang-myeon, Changnyeong-gun, Gyeongnam-province, Korea. A logistic regression model was applied to recognize the inundation potential by a flood in the Nakdong river basin. And potential soil erodibility index (PSEI) was derived from USLE model to analyze the soil erodibility potential. And a probability model from a logistic regression model was applied to detect the fallow potential. Therefore, we found 220.7ha for the 4th grade and 86.1ha for the 5th grade was analyzed as water damage potential. Large area near Nakdong river have problem to grow the rice due to the damage by water inundation. And 213.6ha for the 3rd grade and 103.3ha for 4th grade was detected as a result of the analysis of soil erosion potential. The soil erosion potential was high when within-field integrity of soil was not stable, or the kinetic energy was high or the slope length was long due to a steep slope of a specific land. And 869.1ha for 3rd grade, 174.9ha for 4th grade, and 110.6ha for 5th grade was detected to be distributed having the fallow potential. Especially, a village, having a steep mountain, had 249.5ha for the 3rd grade, which was 28.7% of total area showing the 3rd grade. Finally, Three villages, including An-ri, Geonam-ri, Songgok-ri, showed they had largest area of the suitable land in the study area. These villages had similar topographic condition where they were far from Nakdong river, and they had relatively higher elevation and flat lands.

• 한국과학교육학회지
• /
• 제33권4호
• /
• pp.735-750
• /
• 2013

본 연구는 학생들이 과학을 학습함에 있어 용어로 인해 겪는 어려움을 해소하고 과학 교육의 효율을 높이기 위한 목적으로 실시되었다. 학생들이 과학 용어에 대해 어려움을 겪고 있는 것에 대한 원인이 과학 교육에서 제공하는 용어들이 특정한 기준에 의한 걸러짐 없이 사용되고 있는 것과 학생들이 과학 용어에 대해서 제대로 교육받을 기회가 없다는 데 있다고 보았다. 이를 해결하기 위한 방안으로 과학 교육에서 사용하는 용어들에 대한 기준을 마련하고, 그 기준에 의해 학생들에게 체계적으로 용어를 교육할 것을 제시하였다. 본 연구에서는 과학 교육에서 용어 사용에 대한 기준을 마련하기 위하여 실제 과학 교육에서 사용되고 있는 용어를 조사하는 경험적 언어학의 연구 방법을 사용하였다. 이에 따라 과학 교육에서 사용할 교육용 과학 용어를 선정하고 각 용어들을 대상으로 교육하기에 적절한 학년으로 배치하고자 하였다. 이를 위한 기초 연구로 7차 교육과정에 따른 과학 교과서 전체의 물리 단원에 수록된 어휘를 조사하고 이 가운데 교육용 과학 용어를 선정하여 학년별로 배치하는 작업을 통해 학년별 교육용 과학 용어 예비 목록을 작성하였다. 그 결과 물리 영역의 교육용 과학 용어 930개를 선정하였으며, 학년별로 3학년 66개, 4학년 38개, 5학년 35개, 6학년 28개, 7학년 203개, 8학년 135개, 9학년 123개, 10학년 302개의 용어를 평정하였다.

• Journal of Biosystems Engineering
• /
• 제37권4호
• /
• pp.215-224
• /
• 2012

Purpose: This study was conducted to classify the energy efficiency of 131 tractor models tested during from 2006 to 2010 in Korea. Methods: Four sub-indexes were developed using the fuel consumptions at 60% and 90% of rated speed with partial loads and at pull speeds of 3.0 km/h and 7.5 km/h with maximum drawbar pull. Weighting factors of the sub-indexes were also considered to reflect the characteristics of tractor's actual working hours in Korea. Four sub-indexes were integrated into a classification index. Using the developed classification index, a five-classification system was made on the basis of normal distribution of tractors over the classification range. Percentage of $1^{st}$ grade interval was expected to be close to 15%, $2^{nd}$ grade 20%, $3^{rd}$ grade 30%, $4^{th}$ grade 20%, $5^{th}$ grade 15%. Results: Number of $1^{st}$ grade was 21, $2^{nd}$ grade 23, $3^{rd}$ grade 39, $4^{th}$ grade 33, $5^{th}$ grade 15 among 131 models. Conclusions: Classification index was developed by integrating four sub-indexes. By the classification method using developed index, distribution of classified tractors was acceptable for practical application.

• 한국학교보건학회지
• /
• 제14권2호
• /
• pp.289-300
• /
• 2001

The purpose of this study is to offer basic data on sex education for middle and high school students through content analysis of sex education subjects. The objects of this study were sex related subjects in the 7th grade curriculum and sex education guide books. The results were as follows: According to the results of analyzing sex education topics classified by grade, the 7th grade accounted for 35.2% of total topics, the 8th grade 2.9%, the 9th grade 2.9%, and the 10th grade 32.3%, the result of analyzing sex education topics classified by subject, showed 76.4% of total topics in sex education guide book, 29.4% were technique and domestic subjects, 20.5% were physical subjects, 17.6% were moral subjects, 8.8% were science subjects, 2.9% were society subjects. The domains which were chiefly concerned in sex education curricula for middle school students were "Human Development", "Relationship", and "Sexual Health". On the other hand, the domains which were mainly concerned with sex education curricula for high school students were "Relationship", "Sexual Behavior" and "Sexual Health". Most sex education subjects provided less instruction concerning "Personal Skills" and "Sexual Behavior" than other domains. The suggestion according to the results were as follows: It is desirable to teach sex education as an integrated subject. Especially, sex education should be a part of a comprehensive school health education program. Because this study focused on analyzing materials for teachers, further research is recommended to analyze sex education materials for students.

• 대한수학교육학회지:학교수학
• /
• 제7권4호
• /
• pp.337-352
• /
• 2005

본 연구에서는 학교수학수업에의 공학적 도구 활용을 논의의 주제로 설정하고 예비수학교사교육에서 사례연구를 실시하였다. 예비관찰을 통해 사례로 선정된 사범대학 재학생들을 대상으로 수학교육프로그램을 활용하여 7${\~}$9단계 수학 학습에 적용할 수 있는 교수-학습 자료를 개발하는 수업활동을 시행하였다. NCTM과 제7차 교육과정의 교수-학습방법 제안을 배경으로 하여 본 연구에서는 공학적 도구를 활용하여 수학학습의 효과를 높일 수 있다는 명제를 개념적 틀로 설정하였다. 그리고 이를 연구의 방향과 자료분석의 토대로 삼았다. 연구과정에서 수집된 관찰자료, 면담자료, 문서자료 등을 토대로 연구의 초기에 설정된 세 가지 연구문제에 대한 결과를 분석하였다. 아울러 학교현장의 수학수업에 활용할 수 있는 공학적 도구 활용교수${\cdot}$학습 보조자료를(단계별 수학디자인 산출물) 개발하여 제시하였다.

• 정보교육학회논문지
• /
• 제24권6호
• /
• pp.529-537
• /
• 2020

스크래치는 교육용 프로그래밍 도구로 초등학교 소프트웨어교육에서 많이 활용되고 있으며 스크래치를 활용한 수업이 학생들의 컴퓨팅 사고력, 문제 해결력 등에 도움이 된다는 연구 결과가 많다. 그러나 스크래치 사용자의 연령 통계 자료를 분석해본 결과 초등학교 저학년 학생들의 스크래치 활용도가 낮았으며 블록 프로그래밍 경험이 있는 고학년 학생들도 프로그래밍의 기본 원리인 순차, 반복, 선택의 개념을 이해하는 것에 어려움이 있었다. 따라서 본 연구에서는 손으로 만지면서 프로그래밍을 학습할 수 있는 스크래치 전자 블록과 전자 블록 활용 프로그래밍 교육 커리큘럼을 개발하였으며 초등학교 2학년과 6학년 학생들을 대상으로 수업을 진행하였다. 수업 전·후 프로그래밍에 대한 흥미도 검사를 진행한 결과 2학년 학생들의 흥미도는 3.28에서 3.58로 향상되었으며 6학년 학생들의 흥미도는 3.41에서 4.09로 증가하였다. 프로그래밍 기본 원리 이해 평가 결과 2학년 학생들 중 84%의 학생들이 주어진 과제 9개 중 7개 이상을 해결하였으며 6학년 학생들 중 62%이상의 학생들의 주어진 과제 9개 중 7개 이상을 해결하였다.

• 융합정보논문지
• /
• 제9권12호
• /
• pp.62-70
• /
• 2019

본 연구는 초등학생의 자아존중감과 공동체의식간의 인과적 관계를 검증하는데 있다. 초등학생이 성장함에 따라 자아존중감과 공동체의식과의 변화정도와 관련성을 파악하기 위해 종단적인 자료를 이용하였다. 이를 위해 한국아동·청소년패널조사(KCYPS)의 초1 패널 자료 중 5차, 6차 7차년도의 종단 자료를 활용하여 청소년의 자아존중감과 공동체의식 사이의 종단적 상호관계를 자기회귀교차지연모형(autoregressive crosslagged model)을 통해 알아보고자 하였다. 자료는 PSAW 18.0와 AMOS를 이용하였다. 본 연구의 대상자는 총 1750명으로 남자가 903명(51.6%), 여자는 847명(48.4%)이다. 초등학교 5학년, 초등학교 6학년, 중학교 1학년의 자아존중감의 평균은 3.29±.51, 3.19±.55, 그리고 3.15±.57이었다. 공동체의식의 평균은 3.12±.52, 3.09±.59, 그리고 3.15±.55이었다. 자기회귀교차지연모형을 통한 분석결과 초등학교 5학년부터 중학교 1학년까지 자아존중감과 공동체의식은 안정적으로 지속되었다. 또한 이전 시점의 자아존중감은 이후 시점의 공동체의식에 유의한 영향을 미치는 것으로 나타났다. 마찬가지로 이전시점의 공동체의식은 이후 시점의 자아존중감에에 영향을 미치는 것으로 나타났다.

• 대한화학회지
• /
• 제47권1호
• /
• pp.67-71
• /
• 2003

7차 교육과정에 따라 개발된 7학년 과학교과서 물질 영역의 탐구활동을 분석하여 교과서의 개발과 학습에 대한 교육적 시사점을 찾고자 하였다. 교과서의 탐구활동을 탐구유형, 탐구과정, 탐구상황 등의 3개의 영역으로 나누어 분석하였다. 6개 출판사에서 발간된 과학교과서의 ‘물질의 세 가지 상태', ‘분자운동', ‘상태변화와 에너지'를 분석 대상으로 하였다. 7학년 물질 영역의 탐구 활동 분석 결과를 종합하였을 때, 탐구 유형이나 탐구 과정 요소 및 탐구 상황의 편중성이 두드러졌으며, 이러한 부분을 보완할 수 있는 탐구 활동으로 학생들을 지도하여야 할 것이다. 또한, 과학과의 교육 목표에 부합되는 교과서 개발을 위해 탐구 활동을 검토하고 교과서 검정 기준에 탐구 활동의 평가틀을 제공하여야 할 것이다.

• 대한수학교육학회지:수학교육학연구
• /
• 제10권1호
• /
• pp.35-55
• /
• 2000

There seems to be a public consensus that the content of Korean mathematics textbooks is extensive and of a high level of difficulty. However, such judgment is the result of a generalization based on individual experience or on the results from comparisons of the international levels of achievement. Therefore, a more objective and stricter approach to the determination of the quantity and level of difficulty of mathematics content is necessary. For this purpose, this study has compared the content of Koreas 6th and 7th junior high school curriculums, and the Korean mathematics curriculum to textbooks of the United States, which has a considerable influence on the making of Korean mathematics textbooks. First of all, a comparison of Koreas 6th and 7th junior high school mathematics curriculums showed a slight reduction in the total quantity of content, as more content was deleted than was added in the 7th curriculum. However, given the fact that the number of hours of mathematics classes has been reduced, the reduction in content cannot be regarded as anything more than a simple reflection of the reduction in hours, proving that the 7th curriculum has not met its revision objective of reducing the content by 30%. Meanwhile, the comparison of the United States junior high school mathematics textbooks to Korea's 7th curriculum showed that the 7th grade content in the United States was much broader, encompassing content which in Korea ranged from the 2nd grade of elementary school to the 2nd year of junior high school. Therefore, on the surface, it may appear that the overall level of content in the American mathematics textbook is lower than that of the Korean. However, there are several cafes, such as statistics and probability, where certain content was more difficult and introduced at an earlier grade in the United States than in Korea. In fact, it can be said that Korea students tend to find content of the mathematics textbooks to be harder than they actually are because they are delivered as a mere aggregate of algorithms, with little consideration to its application in their everyday lives. In this respect, there is much room for improvement on the mathematics textbooks of Korea.