• Journal of Gifted/Talented Education
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• v.25 no.4
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• pp.649-667
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• 2015

This study handled underachievement issue of gifted students by developing and validating educational programs as a solution, or relief, of their academic underachievement problems. The proposed educational program was designed to enhancing reading comprehension ability of gifted students with underachievement. Based on comprehensive literature review, this study found that key issues of underachievement have to do with learning strategy, and also that learning strategy was established as 'reading comprehension strategy.' Considering diverse reading comprehension models and strategies suggested by preceding studies, the reading comprehension strategy program in Korean was customized for underachieving gifted students on the middle school level. The effectiveness of the reading comprehension strategy program as a solution to underachievement of gifted students was explored by applying the developed program to 36 identified students after school twice a week for 6 weeks, conducting pre- and post-tests that were selected to measure their reading comprehension abilities, collecting their academic achievement data before and after the intervention by this study, and interviewing students. As the results of this study, reading metacognition ability, reading comprehension skills, and school grades of gifted students with underachievement were meaningfully improved as a group. On the individual level, 12 identified students, exactly one third of the whole group of underachieving gifted students, showed so improved academic achievement as we can say they overcame underachievement based on the Supplee's definition.

• Journal of Elementary Mathematics Education in Korea
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• v.23 no.1
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• pp.169-192
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• 2019

This study investigates how well grade 4, 5, and 6 students understand graphs before formal education is done on graphs. For this, we analyzed students' understanding of graphs by classifying them into 'reading data', 'finding relationships between data', 'interpreting data', and 'understanding situations' based on previous studies. The results show that the students have good understanding of graphs that did not have formal education. This suggests that it is necessary to consider the timing of the introduction of the graph. In addition, when we look at the percentage of correctness of each graph, it is found that the understanding of the line graph is weaker than the other graphs. The common error in most graphs was that students relied on their own subjective thoughts and experiences rather than based on the data presented.

• Journal of The Korean Association For Science Education
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• v.33 no.7
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• pp.1273-1284
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• 2013

The purpose of this study was to analyze the examples represented in school science textbooks by the function types for students' scientific conceptions. According to the framework of analysis, we selected lacking examples in the textbooks, and developed a questionnaire for students. The questionnaire was applied to 157 third grade students to survey their conceptions related to matter states and change of states. The ratio of students' scientific conceptions related to solid the state was high because distinct examples were represented in the textbook. However, the ratios of students' scientific conceptions related to the liquid and gas states were low because there were no distinct examples in the science textbook. Contrast examples and expansive examples of liquid and gas such as fog and steam need to be represented in science textbooks in order to help students construct scientific conceptions of matter states and change of states.

• Journal of the Korean earth science society
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• v.28 no.4
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• pp.415-430
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• 2007

The purpose of this study was to investigate the characteristics of high school students' conceptual understanding about minerals and rocks. A questionnaire was developed to examine students' conceptions of minerals and rocks. The data were collected from 93 students in 10th and 119 students in 11th grades in a high school. The result showed that students' understanding of minerals and rock was on the moderate level. The 10th grade students showed a relatively lower level of understanding about igneous rocks while the degree of the 11th graders' understanding about certain concepts related with melting point in the rock domain was a little bit lower than the average. Although the understanding levels between the two grade levels were similar, there were some items for which students understanding seemed to be more sophisticated with the grade. In the questions about the characteristic of basalt surface, however, the frequencies of non-scientific conceptions were not decreased, rather increased along with the grade. It was also found that the conceptions students acquired from other science lessons as well as earth science classrooms did rather interfere with students' construction of the scientific concepts of minerals and rocks even though sometimes they were helpful for learning. It was suggested that the teachers should understand that some specific terms in earth science have different meanings as they were used in other subjects.

• Communications of Mathematical Education
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• v.12
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• pp.103-124
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• 2001

수학은 계통성이 강한 학문이다. 이러한 수학의 특성은 학습의 결손이 있거나 학습속도가 느린 학생들에게 수학을 학습하는 데 어려움의 근원이 된다. 특히 중학교 수학에서는 처음으로 형식적인 수학이 도입되기 때문에, 중학교 1학년에서 수학을 제대로 이해하지 못할 경우 그 학생은 수학 장애아, 수학부진아로 전락할 가능성이 있다. 그러나 학교에서의 개별지도는 어려운 실정이다. 따라서 수학 부진아를 선정하여 수학학습에서의 어려움을 진단하고, 학생의 오개념과 오류를 분석한 후, 그 학생에게 맞는 학습전략을 선택하여 처방 지도하고자 한다. 이를 통해 학생의 이해와 사고과정을 알아보고 태도변화를 고찰하는 것을 목적으로 한다.

• Journal of the Korean Chemical Society
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• v.50 no.5
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• pp.374-384
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• 2006

this study, the teaching methods of three science teachers for lead-iodide precipitation reaction experiment were compared. The difference of 9th grade students' understanding was searched according to the science teachers teaching styles, also. Among the three teachers, Teacher A taught students based on the science textbook and allowed students to think themselves and to get out conclusion by the experiment. Teacher B and Teacher C gave students a lot of explanations related to interpretation of the experiment. The percentage of no response on the experiment report of Teacher A was higher than those of Teacher B and Teacher C. But the students of Teacher B and Teacher C tended to have limited thoughts because of the teachers explanations. In spite of the difference, it was common phenomenon that few students understood concepts through the experiment. A lot of students were interested in the experiment, but it was hard to understand Law of definite proportions according to the experiment.

• Journal of The Korean Association For Science Education
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• v.18 no.4
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• pp.463-472
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• 1998

Biotechnology is the process of using biological system for the production of materials. Genetic engineering, a subset of biotechnology, is the process of altering biological systems by the purposeful manipulation of DNA It is a new field in biology and no topic in biology is more likely to impact our personal lives and is therefore more worthy of our attention and understanding. The purpose of this study was to investigate students' understanding of the concepts of biotechnology, and a test tool which is made up of 20 basic questions was developed for the study. The subject of this study was high school students and the sample size was 486. In order to find out the source of students' misunderstanding, we also analysed high school textbooks and teachers were given the same tool applied to students. Two-way ANOVA was used for the analysis. Major findings of this study are as following; 1. Mean score of students was 41, and there was a significant difference between the scores of boys and girls(p<0.05). Female students scored higher than male students. The variables "region" and "major" had no significant influence. 2. Students' the most misunderstood concepts were "monoclonal antibody" and "gene cloning". Many students thought that a plamid DNA originally has a useful DNA in it, which is apparently wrong. 3. Mean score of teachers was 82, and the variabes of gender and career did not have statistically significant influence on the result(p>0.05). 4. Teachers got the lowest scores on the concepts of "gene therapy", "the accomplishment of biotechnology in agriculture and medicine", and "plasmid DNA". The results of item analysis implied that teachers' misunderstanding might be a part of the sources of students' misunderstaning. 5. Out of 18 basic concepts selected in the study, only 10 concepts were explained well enough in most textbooks. The results of item analysis indicated that textbooks also could be a part of the source of students' misunderstanding.

• Journal of Science Education
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• v.33 no.2
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• pp.346-352
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• 2009

The purpose of this research was to analyze the chinese chemistry terminology in chemistry unit of 7th grade science textbooks in 7th curriculum and find relationship between student understanding and difficulty index for chinese preferred students and non-chinese preferred students. The chinese terminology in 7th curriculum was reduced less than that of 6th curriculum but still was over 70%. Students had difficulties in understanding of abstract terminologies and science terms but thought easily the concrete, common terminologies. The tendency of student understanding was similar to that of difficulty index. For chinese chemistry terminology, understanding of chinese preferred students was higher than that of non-chinese preferred students. For easily translated chemistry terminology, there was no significant difference but both were showed the improved understanding. Therefore student understanding should be improved in science if science textbooks would be written by easily translated chemistry terminology.

• Journal of the Korean Chemical Society
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• v.48 no.4
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• pp.399-413
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• 2004

In this study, a survey was conducted of students of elementary through college on their conceptions of phenomenon related with dissolution, saturation, and extraction. The teaching strategies of elementary and secondary teachers related to dissolution phenomena were also investigated. Most of elementary and secondary school students thought of dissolution as a phenomenon in which particles broke into the spaces between other particles. This explanation called 'space conception' can be sought in elementary school science textbooks. Some of high school students also had this type of thought. A concept of dissolution phenomenon as 'hydration through attraction of solvent and solute' was held by most of students of 11th, 12th grade, and college. This explanation called 'attraction concept' can be sought in high school chemistry textbooks for 11th and 12th grade. But many students of elementary through college used analogies and models related to 'space conception' when they tried to explain the dissolution phenomena. This indicates that the 'attraction concept' was not firmly established in the students' cognition. 90% of elementary school teachers thought and taught dissolution as a phenomenon in which two different size particles were mixing together like as mixing beans and millets. The model does not represent the attractions among solvent-solvent particles, solvent-solute particles, and solute-solute particles. This model only represents the space size effect (smaller size particles fitting into the spaces of larger size particles). Half of the secondary school teachers also had 'space conception' and only 20% of the teachers had 'attraction concept' Many teachers who had 'attraction concept' used to represent explanation related to 'space conception' for teaching dissolution.

• Journal of the Korean School Mathematics Society
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• v.14 no.1
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• pp.43-64
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• 2011

The purpose of this study was to analyze the progress of children's abstraction and to investigate how elementary students understand through mathematical modeling approach in the sixth grader's learning of surface area. Each small group showed their own level on abstraction in mathematical modeling progress. The participants showed improvements in understanding regarding to surface area context.