• Journal of Educational Research in Mathematics
• /
• v.8 no.1
• /
• pp.59-71
• /
• 1998

Recently, most classrooms in Korea are fully equipped with multimedia environments such as a powerful pentium pc, a 43″large sized TV, and so on through the third renovation of classroom environments. However, there is not much software teachers can use directly in their teaching. Even with existing software such as GSP, and Mathematica, it turns out that it doesn####t fit well in a large number of students in classrooms and with all written in English. The study is to analyze the characteristics of problem-solving process and to develop a computer program which integrates the instruction of problem solving into a regular math program in areas of quadratic functions and ellipses. Problem Solving in this study included two sessions: 1) Learning of basic facts, concepts, and principles; 2) problem solving with problem contexts. In the former, the program was constructed based on the definitions of concepts so that students can explore, conjecture, and discover such mathematical ideas as basic facts, concepts, and principles. In the latter, the Polya#s 4 phases of problem-solving process contributed to designing of the program. In understanding of a problem, the program enhanced students#### understanding with multiple, dynamic representations of the problem using visualization. The strategies used in making a plan were collecting data, using pictures, inductive, and deductive reasoning, and creative reasoning to develop abstract thinking. In carrying out the plan, students can solve the problem according to their strategies they planned in the previous phase. In looking back, the program is very useful to provide students an opportunity to reflect problem-solving process, generalize their solution and create a new in-depth problem. This program was well matched with the dynamic and oscillation Polya#s problem-solving process. Moreover, students can facilitate their motivation to solve a problem with dynamic, multiple representations of the problem and become a powerful problem solve with confidence within an interactive computer environment. As a follow-up study, it is recommended to research the effect of the program in classrooms.

• Communications of Mathematical Education
• /
• v.30 no.3
• /
• pp.263-280
• /
• 2016

This study aims to examine the impact of RUBRIC writing on students' mathematical modeling. By analyzing 23 tenth grade students' responses to seven problems related to mathematical modeling, we found that the students who used RUBRIC writing could not only get more correct answers but also could use more various representations and mathematical models than the students who did not use it. The students with RUBRIC writing also could translate between reality and mathematics more appropriately, and better explain the process to solve the problem than the counterpart. It implies that RUBRIC writing can help improve students' mathematical modeling and problem solving as an alternative instruction and assessment.

• Journal of The Korean Association For Science Education
• /
• v.22 no.1
• /
• pp.22-31
• /
• 2002

This research was designed to verify the effects of reading materials about scientists on the attitude toward science and images of scientists. The studies have been conducted for students in the tenth grade science class. In experimental group, students were instructed to read the reading material regarding the role models of five female scientists in class, while a control group were furnished with those of male scientists. Before and after instruction, the pre- and post-test about attitudes toward science and images of scientists were administered. In general, it was found that they successfully cast away the stereotyped images of scientists with the aid of the reading materials. There were significant differences between two groups in gender of a scientist (p = .000). Namely, more students in the experimental group had drawn the pictures of female scientists than those in the control group. In addition, test score in attitude toward science have shown significant differences between pre- and post-test (p < .001). And, the experimental group score is higher than control group (p < .05). Accordingly, this research has verified that the reading materials about scientists, especially of female scientists, can have favorable influence on the attitudes and images of scientists.

• Journal of The Korean Association For Science Education
• /
• v.17 no.2
• /
• pp.179-189
• /
• 1997

In this study, a conceptual change model for effective laboratories was developed and its instructional effect on students' achievement, the acquisition of scientific conceptions, and the attitudes toward science was investigated. Considering several conceptual change models in literature and Korean educational situations, the conceptual change model was developed. The model consists of 5 stages; preliminary, prediction, exploration, consolidation and reconstruction, and application. The treatment and control groups (2 classes) were selected from a middle school in Seoul, and taught about the changes of states, density, and dissolution for three weeks. Prior to instruction, the Group Assessment of Logical Thinking and the Learning Approach Questionnaire were administered, and their scores were used as covariate and / or blocking variable. To examine students' alternative conceptions before the instructions, a pre-conceptions test was also administered. After the instructions, students' achievement, the acquisition of scientific conceptions, and the attitudes toward science were measured with a researcher-made achievement test, a post-conceptions test, and the subtests of the Test of Science-Related Attitudes, respectively. The results indicated that the score of the treatment group was significantly higher than that of the control group in the post-conceptions test. The students in the treatment group had also less alternative conceptions than those in the control group. However, there were no significant differences for the achievement and the attitudes toward science. Educational implications are discussed.

• The Journal of Korean Association of Computer Education
• /
• v.7 no.5
• /
• pp.9-21
• /
• 2004

In spite of the strong request that Internet, a new IT technique, should be extensively used in classroom settings, WBI is not still wide spread. One possible reason is that most WBIs developed so far are not qualitatively different from the traditional classroom ones and various design models for WBI are unknown. Developing a WBI program according to Goal-based Scenarios (GBS), a constructivistic instructional design model, this study offers a useful case for the design and development of WBI to educators and implementers. The program developed embodied seven important components of the GBS model. The development process also included needs assessment, task analysis, and learner and environment analysis, which are the basic components of the domain of instructional design. The GBS development case in this article will provide concrete guidelines to educational practitioners who have an intention to create a new type of WBI in schools as well as in corporate.

• The Journal of Korean Association of Computer Education
• /
• v.18 no.1
• /
• pp.81-97
• /
• 2015

Although Flipped Classroom(FC) which has recently attracted attention of educational field, showed its various educational effects such as learning academic achievement, attitude, collaborative learning and self-regulated learning. other studies also showed a number of significant problems and challenges in practically implementing. Thus, this study aims to investigate in-service and pre-service teachers awareness of FC in order to explore its educational feasibility for successfully adopting it to classrooms through the alternative solutions to its limitations. To achieve this goal, we firstly conducted literature review on teaching and learning models and guidelines to draw educational prerequisites and then analyzed needs of 156 pre-service teachers and 42 in-service teachers. According to survey results, 80% of teachers are willing to apply FC to their classes and hope to be offered with pre-learning activity materials and guidelines. They consider junior high school students and college students as appropriate learners, social science, science, Korean, and English as suitable subjects, and video content as optimal materials for pre-learning activities.

• Journal of The Korean Association For Science Education
• /
• v.19 no.4
• /
• pp.665-673
• /
• 1999

We examined how science teachers in middle schools practiced and perceived using analogies. A survey was administered to obtain 131 teachers' responses from 22 middle schools in Seoul. Most science teachers used analogies frequently in their instructions, and had positive attitudes toward the effect of analogies. They agreed that relevant figures should be presented with analogies, analogy itself should be explained to their students, and something to mislead the students' idea should be mentioned. They also responded that they practiced so in their instructions. However, it was revealed that they neither explained a concept with several analogies nor helped students to make self-generated analogies. Their idea was that proper analogy sources and instructional models were needed for using analogy effectively in science instruction. The teachers with above masters degree explained the analogy itself, and they perceived the needs for supplements and strategies in using analogy more affirmatively. The teachers possessing modern perceptions to science instructions and students' activities rather than classical ones used analogies more frequently and effectively.

• Journal of Advanced Navigation Technology
• /
• v.14 no.2
• /
• pp.233-238
• /
• 2010

In this paper, we applied the forward and backward error recovery techniques to a reduced instruction set computer (risc) processor to develop two fault-tolerant processors, namely, fetch redundant risc (FRR) processor and a redundancy execute risc (RER) processor. To evaluate the fault-tolerance capability of three target processors, we developed the base risc processor, FRR processor, and RER processor in SystemC hardware description language. We performed fault injection experiment using the three SystemC processor models and the SystemC-based simulation fault injection technique. From the experiments, for the 1-bit transient fault, the failure rate of the FRR, RER, and base risc processor were 1%, 2.8%, and 8.9%, respectively. For the 1-bit permanent fault, the failure rate of the FRR, RER, and base risc processor were 4.3%, 6.5%, and 41%, respectively. As a result, for 1-bit fault, we found that the FRR processor is more reliable among three processors.

• Proceedings of the Korean Institute Of Construction Engineering and Management
• /
• autumn
• /
• pp.410-415
• /
• 2001

Earned Value Management System(EVMS) has been considered as a useful tool of managing construction projects lately and its instruction into a private industry is now under consideration by the Korean government. It is on the basis of C/SCSC that had been released by the U.S. Department of Defense(DOD) since 1967. Its research has been in the active progress in order to utilize the earned value concept as a project management tool for construction project ordered by both government and private sector. Material Requirement Planning(MRP) is also known as a tool of planning and scheduling resources for assembly product as a part of inventory control models in the manufacturing industry. The purpose of this study is the effective employment of Earned Value Management to manage the construction projects by utilizing Material Requirement Planning(MRP), based on project management software and Workpackaging model.

• Journal of Korean Elementary Science Education
• /
• v.22 no.1
• /
• pp.109-120
• /
• 2003

The purpose of this study is to observe, to analyze of the preservice teachers' naive theories about the change of season. And it is to find a instruction strategy which can solve problem about this. The general idea about the change of season is observed by the 3 methods which are simply explaining with words, explaining with pictures and models. The author is to find the similarity. difference and relationship which the preservice teachers have about the general idea about the change of season. The important changable primary factors, which can effect to the general Idea formation, are naturally dragged out through the observation of preservice teachers participation. For this study, 4 first year preservice teachers of one of national university of education are used. Before the interview. the author tries to form rapport with the preservice teachers. Experiment materials, pencil. paper, camcorder, digital recorder and interview note were used for the study with reflection of them just way they are. As the result of the interview. all of 4 preservice teachers had not being understand the concept about the change of season and the three ways of explanation methods were not matched each other, so it is revealed that the general Idea of the change of season, which the preservice teachers have, is not strongly formed. In spite of the repeated study of the change of season from elementary school to university, it has many problem about recognition of the general idea about the change of season which pre-elementary teachers have. Therefore it is needed to improve the experiment in elementary science text book and naive theories by the activity which is explaining the change of season in three dimension space. to prevent the naive theories which the preservice teachers may have.