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All Journal JURNAL KEPEMIMPINAN DAN PENGURUSAN SEKOLAH Jurnal Manajemen Pendidikan
Dewi Devita
Universitas Putra Indonesia YPTK Padang, Indonesia
Education

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Efektivitas Penggunaan Media Berbasis Geogebra Pada Bangun Datar Dalam Pembelajaran Matematika Siswa Kelas V SDN 14 Ranah Pesisir Lili Rismaini; Dewi Devita
Jurnal Kepemimpinan dan Pengurusan Sekolah Vol. 9 No. 2 (2024): June
Publisher : STKIP Pesisir Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34125/jkps.v9i2.351

Abstract

This research is motivated by the teacher-centered nature of current education. In recent years, the rapid advancement of information technology has significantly transformed how society seeks and acquires information. This technological progress has also influenced educational media, traditionally dominated by print-based learning materials used by teachers. The aim of this study is to enhance student learning outcomes through the use of GeoGebra-based media, which is effective in mathematics education. This research can be categorized as quantitative research with a quasi-experimental method. The study was conducted on fifth-grade students at SD N 14 Ranah Pesisir. The research instrument was developed to assess the effectiveness of using GeoGebra-based media in teaching planar geometry. The results of this study, analyzed using statistical methods including the Paired Sample Test, indicated a significance level (2-tailed) of 0.000, which is less than the alpha value of 0.05. This means that the significance value (0.000) is smaller than the alpha value (0.05), leading to the rejection of the null hypothesis (Ho) and the acceptance of the alternative hypothesis (Hi). Therefore, it can be concluded that there is a significant difference in students' mathematics learning outcomes before and after using GeoGebra in planar geometry instruction.
ANALYSIS OF STUDENTS MISCONCEPTIONS IN SOLVING QUADRATIC INEQUALITIES: A CASE STUDY IN THE INFORMATICS STUDY PROGRAM Dewi Devita; Deby Erdriani; Laila Marhayati
Jurnal Manajemen Pendidikan Vol. 11 No. 1 (2026): Regular Issue
Publisher : STKIP Pesisir Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34125/jmp.v11i1.1384

Abstract

Strong mathematical foundations are crucial for informatics students, yet they frequently encounter difficulties with foundational topics such as quadratic inequalities, revealing a significant disconnect between procedural competence and conceptual understanding. This study investigates the nature and origins of misconceptions in solving quadratic inequalities among informatics students, using Vergnaud’s Theory of Conceptual Fields as an analytical framework. A qualitative case study was conducted with 28 students from an Informatics Study Program. Data were collected through triangulation, including analysis of written solutions to five inequality problems and a self-report questionnaire featuring Likert-scale and open-ended questions. The analysis followed four stages: error identification, frequency profiling, cognitive scheme analysis, and representational analysis. Findings indicate that the most common errors were procedural, notably incorrect sign reversal when multiplying or dividing by a negative number (46.4% reported high difficulty) and misdetermining solution intervals for perfect square inequalities (39.3%). Conceptual errors were linked to underdeveloped cognitive schemes, especially in connecting critical points to interval testing and translating contextual problems into mathematical symbols.
Co-Authors Deby Erdriani Laila Marhayati Lili Rismaini