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All Journal Jurnal Absis : Jurnal Pendidikan Matematika dan Matematika
Nurhanurawati
Universitas Lampung, Indonesia
Mathematics

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Analysis of students' mathematical reasoning difficulties in solving systems of linear equations in two variables Novita Dwi Lestari; Nurhanurawati; Wayan Rumite
Jurnal Absis: Jurnal Pendidikan Matematika dan Matematika Vol. 8 No. 2 (2025): Jurnal Absis
Publisher : Program Studi Pendidikan Matematika Universitas Pasir Pengaraian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30606/absis.v8i2.3211

Abstract

The purpose of this study was to describe students' mathematical reasoning difficulties in solving problems involving systems of linear equations in two variables. This research employed a mixed-methods design with an explanatory sequential approach. The participants were 31 eighth-grade students in Class VIII-C at SMP Negeri 14 Bandar Lampung. Data were collected through tests and interviews. The test, consisting of four essay-type questions, was administered to all 31 students, while interviews were conducted with two selected students. The instruments used included a written test and an interview guide. Data analysis was carried out in two stages: descriptive statistical analysis was used for the quantitative data, and the Miles and Huberman model (data reduction, data display, and conclusion drawing) was applied for the qualitative data. The results showed that the average percentage of students' mathematical reasoning difficulties was 54.91%. The stages with the highest levels of difficulty were performing mathematical manipulations (58.33%) and drawing conclusions (76.34%). The analysis revealed that students struggled with algebraic operations and basic calculations when solving systems of linear equations in two variables. Furthermore, the interviews indicated that some students failed to provide final answers either because they had difficulty interpreting the results within the problem context or simply forgot to write them down.
The effect of guided inquiry learning model on students' mathematical critical thinking abilities Ervina Farahnaz Simatupang; Nurhanurawati; Agung Putra Wijaya
Jurnal Absis: Jurnal Pendidikan Matematika dan Matematika Vol. 8 No. 3 (2025): Jurnal Absis
Publisher : Program Studi Pendidikan Matematika Universitas Pasir Pengaraian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30606/absis.v8i3.3359

Abstract

Mathematics is an abstract discipline that requires higher-order thinking skills, particularly mathematical critical thinking, to be meaningfully understood. However, students' mathematical critical thinking skills in Indonesia remain relatively low. This study aimed to examine the effect of the Guided Inquiry learning model on students' mathematical critical thinking skills. The population of this study consisted of all eighth-grade students at a junior high school in Lampung Province, totaling 192 students distributed across six classes (VIII-A to VIII-F). The sample was selected using a cluster random sampling technique, resulting in 25 students from class VIII-D as the experimental group and 27 students from class VIII-B as the control group. This study employed a pretest–posttest control group design. Quantitative data were collected through essay-type pretests and posttests. Based on the results of the hypothesis testing using the Mann–Whitney U test at a significance level of α = 0.05, the median N-gain of students' mathematical critical thinking skills in the Guided Inquiry group was higher than that of students who experienced conventional learning. These findings indicate that the application of the Guided Inquiry learning model has a positive effect on improving students' mathematical critical thinking skills.
The effect of the discovery learning model on students' mathematical reflective thinking skills Fadhel Ahmad Meizano; Nurhanurawati; Mella Triana
Jurnal Absis: Jurnal Pendidikan Matematika dan Matematika Vol. 8 No. 3 (2025): Jurnal Absis
Publisher : Program Studi Pendidikan Matematika Universitas Pasir Pengaraian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30606/absis.v8i3.3444

Abstract

Mathematical reflective thinking is an essential higher-order thinking skill that supports students in analyzing, evaluating, and drawing conclusions during problem solving. This study aims to examine the effect of the Discovery Learning (DL) model on students' mathematical reflective thinking skills. The research employed a quantitative approach using a quasi-experimental design with a pretest–posttest control group. The population consisted of all Grade VIII students of SMP Negeri 9 Bandar Lampung in the 2024/2025 academic year, with two classes selected as the experimental and control groups through cluster random sampling. Data were collected using a mathematical reflective thinking skills test and analyzed using N-Gain analysis and an independent sample t-test. The results show that students taught using the DL model achieved higher posttest scores and greater improvement in mathematical reflective thinking skills compared to students taught through conventional learning. The average N-Gain of the experimental class was higher than that of the control class, and hypothesis testing indicated a significant difference between the two groups. These findings indicate that the Discovery Learning model has a positive and significant effect on students' mathematical reflective thinking skills and can be effectively implemented in mathematics learning.
Co-Authors Agung Putra Wijaya Ervina Farahnaz Simatupang Fadhel Ahmad Meizano Mella Triana Novita Dwi Lestari Wayan Rumite