• Journal of the Korea Institute of Information and Communication Engineering
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• v.26 no.11
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• pp.1608-1614
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• 2022

As competition between universities intensifies due to the recent decrease in the number of students, it is recognized as an essential task of universities to predict students who are underperforming at an early stage and to make various efforts to prevent dropouts. For this, a high-performance model that accurately predicts student performance is essential. This paper proposes a method to improve prediction performance by removing or amplifying abnormal data in a classification prediction model for identifying underperforming students. Existing anomaly data processing methods have mainly focused on deleting or ignoring data, but this paper presents a criterion to distinguish noise from change indicators, and contributes to improving the performance of predictive models by deleting or amplifying data. In an experiment using open learning performance data for verification of the proposed method, we found a number of cases in which the proposed method can improve classification performance compared to the existing method.

• Journal of the Korean School Mathematics Society
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• v.20 no.4
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• pp.521-536
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• 2017

One of difficulties with which teachers meet is to have underachievers with no willingness and motivation for study involved in class. Mathematics underachiever are average or above average in their intelligence but their actual achievement in mathematics did not coincide to their intellectual capabilities. The teaching strategy for them is to motivate them to try to study mathematics and to experience the improvement in their mathematics grade. In this paper, we choose flipped classroom as the strategy of teaching basic mathematics to math underachievers and applied it to them. Then we wanted to make sure the possibility for applying flipped classroom to teaching math underachievers through the analysis of change in the scholastic achievement of students in mathematics and mathematical disposition. The results of this study are as followings; First, when we taught basic math to underachievers using a flipped classroom, we confirm that math underachievers with active participation improved scholastic achievements significantly. Second, the flipped classroom was led to positive effects in an affective domain. In particular, it showed the most noticeable change in the area of willingness to math problem-solving and perception about the value of mathematics.

• Journal of Engineering Education Research
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• v.18 no.1
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• pp.54-60
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• 2015

The purposes of the study are to investigate the effects on academic of the self-directed learning and in-depth interviewing program in engineering underachieved students. 17 students participated in program and the grade points average(GPA) of participants are less than 2.5. First, we focus on the change of academic achievement after the self-directed learning and in-depth interviewing program. According to results, it is very effective not only in improving academic achievement of the participation subject but also in increasing GPA. Second, the pre-survey and the post-survey were conducted to the participants. We found some facts from the difference between the pre and post surveys. The expectation and satisfaction about learning have improved after self-directed learning, and the participants' recognition showed the meaningful change in important factors about learning.

• Education of Primary School Mathematics
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• v.16 no.2
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• pp.163-182
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• 2013

The purpose of this study is an analysis on the 3rd graders' achievement in the elementary school. For this purpose, this study, first, analysed on the 3rd graders' achievement like the ratios of the achievement levels for whole students, sexual students, and regional students. Second, this study analysed the 3rd graders' assessment results like the total averages, averages for the contents area, sexual students, and regional students. Third, this study analysed students' special responses on the items.

• Proceedings of the Korean Society for Information Management Conference
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• 2014.08a
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• pp.49-58
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• 2014

초등학교 5학년 학생들을 대상으로 독서부진요인을 알아보기 위한 측정도구를 개발하는데 목적이 있다. 연구방법으로는 질적 양적 연구를 모두 실행하는 혼합연구방법을 선택하였으며, 연구 대상자는 5학년 학생 1,320명으로, 1단계 질적 연구에서는 포커스그룹 인터뷰와 문헌연구를 수행하였다. 2단계 양적 연구에서는 질적 연구에서 도출된 내용을 근거로 예비문항을 개발하여 구조화된 질문지를 제작하였다. 3단계 양적 연구에서는 측정도구의 신뢰성과 타당성을 확보하기 위하여 소수의 학생을 대상으로 2회의 예비조사를 실시하였다. 결과로는 4개 평가영역, 12개 평가항목, 44개 평가내용으로 구성하였다.

• School Mathematics
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• v.16 no.4
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• pp.659-675
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• 2014

The purpose of this study is to investigate the effects of scheme based strategy Instruction on problem solving of word problems of ratio and proportion for students with under achievement or at risk for learning disabilities. Three $7^{th}$ graders of underachieving or at risk LD were participated in this study. Three steps of instructional experiment-testing baseline, intervention with schematic-based strategy, testing for the abilities of problem solving, generalization, & sustainability. The results showed that the schema-based strategy, FOPS was effective method for all three students enhancing problem solving abilities and for generalizing and sustaining the problem solving.

• Journal of the Korean School Mathematics Society
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• v.19 no.3
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• pp.277-289
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• 2016

This study is to figure out the activity of individual education with the note-taking in math class and correction and supportive explanations on attitudes toward learning of underachievers in mathematics in the second-year class of high school. This study has begun on the basis of the judgement that the note-taking especially correction and supportive explanations could help the underachievers in mathematics focus in class and develop good learning habits, and besides, students make a good relationship with teacher. According to this result, Many researches and exertions need to inform every student that mathematics is open and doing mathematics is a happy object. if the students who are underachievers were given the chance to organize their learning by themselves in the class with note-taking and correction and supportive explanations in the long-term, it should be effective enough to change their attitudes toward learning.

• Journal for History of Mathematics
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• v.24 no.4
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• pp.157-180
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• 2011

This paper analyzed about gender difference in the achievement of underachievers of high school students while learning using technology. Participants were composed of 67 underachievers on first grade in high school located in a metropolitan city. That had never used a mathematics educational calculator before. Target participants were divided into two groups: experiment group that studied activity papers with a CAS calculator. And control group that studied the same activity papers using only paper-and-pencil. The content of the activity papers for the two groups was the same, but the structure differed. The two groups completed mathematics achievement tests both before and after the activity papers. The results are that find out no difference of the mathematics achievement between boys and girls in each group, and that the mathematics achievement of boys in experiment group are better than one of boys in control group, and also girls.

• Proceedings of the Korea Society of Mathematical Education Conference
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• 2010.04a
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• pp.99-113
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• 2010

• Communications of Mathematical Education
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• v.5
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• pp.443-460
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• 1997