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de Fermat : Jurnal Pendidikan Matematika
Published by Universitas Balikpapan
ISSN : 26216078     EISSN : 26217309     DOI : -
Core Subject : Education,
Education Mathematics Other
Jurnal de Fermat adalah jurnal yang diterbitkan oleh Program Studi Pendidikan Matematika Universitas Balikpapan. Terbit dalam dua kali setahun, yaitu pada bulan Juni dan Desember.
Arjuna Subject : -
Articles 158 Documents
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PEMANFAATAN MASALAH MATEMATIKA TERBUKA DALAM PEMBELAJARAN SEBAGAI STRATEGI DALAM MENINGKATKAN KEMAMPUAN BERPIKIR KRITIS : SYSTEMATIC LITERATURE REVIEW Ni Ketut Junita; I Gusti Ngurah Pujawan; I Putu Wisna Ariawan
De Fermat : Jurnal Pendidikan Matematika Vol. 9 No. 1 (2026)
Publisher : Program Studi Pendidikan Matematika, Fakultas Keguruan dan Ilmu Pendidikan, Universitas Balikpapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36277/defermat.v9i1.2499

Abstract

Students' critical thinking skills in mathematics learning remain relatively low due to the dominance of conventional teaching that focuses on procedures and single correct answers. This study aims to analyze the effectiveness of open-ended mathematical problems in improving students' critical thinking skills, describe their implementation, and identify factors influencing their success. The method employed is a Systematic Literature Review (SLR) examining 22 selected articles obtained through searches on Google Scholar, ERIC, and Semantic Scholar databases, supplemented by manual reference searching, from a total of 212 identified articles. The article selection process was carried out using the identification, screening, eligibility, and inclusion stages based on the PRISMA guidelines, applying predefined inclusion and exclusion criteria within the publication range of 2016–2026. The results indicate that the use of open-ended mathematical problems is effective in enhancing students' critical thinking skills, evidenced by improvements in analysis, evaluation, and decision-making abilities, with a high effect size of 1.44. Implementation is carried out through stages of problem presentation, strategy exploration, discussion, and student-centered reflection. The success of this approach is influenced by problem quality, teacher competence, student engagement, and a supportive learning environment. Therefore, open-ended mathematical problems can serve as an effective alternative learning strategy to develop students' critical thinking skills.
KESIAPAN GURU DALAM MENGIMPLEMENTASIKAN ASESMEN DIAGNOSTIK PADA PEMBELAJARAN MATEMATIKA DI SMP NEGERI 4 TONDANO Matthew Clay Immanuel Damopolii; Rosiah Juliati Pulukadang; Cori Pitoy
De Fermat : Jurnal Pendidikan Matematika Vol. 9 No. 1 (2026)
Publisher : Program Studi Pendidikan Matematika, Fakultas Keguruan dan Ilmu Pendidikan, Universitas Balikpapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36277/defermat.v9i1.2505

Abstract

This study aims to determine teachers’ readiness in implementing diagnostic assessment in mathematics learning at SMP Negeri 4 Tondano. This research employed a qualitative approach with a case study design. The subjects of the study consisted of three mathematics teachers who had implemented diagnostic assessment in their teaching. Data collection techniques included in-depth interviews, classroom observations, and documentation of diagnostic assessment instruments and blueprints. The data were then analyzed using the interactive data analysis model by Miles and Huberman, which involves data reduction, data display, and conclusion drawing. To ensure data validity, source and technique triangulation were applied. The results showed that teachers’ readiness falls into the sufficient category. Two teachers (Mathematics Teacher 1 and Mathematics Teacher 2) have understood the concept, developed instruments, implemented, and evaluated diagnostic assessment well, although there are still challenges related to students’ readiness. Meanwhile, one teacher (Mathematics Teacher 3) has not implemented diagnostic assessment formally. The instruments developed include test blueprints and cognitive test items; however, they do not yet fully cover non-cognitive assessment components and comprehensive evaluation instruments
Bahasa Inggris Bahasa Indonesia: Bahasa Indonesia Rendi Mulyana; Mega Nur Prabawati; Sri Tirto Madawistama
De Fermat : Jurnal Pendidikan Matematika Vol. 9 No. 1 (2026)
Publisher : Program Studi Pendidikan Matematika, Fakultas Keguruan dan Ilmu Pendidikan, Universitas Balikpapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36277/defermat.v9i1.2506

Abstract

This study aims to examine the feasibility of a learning media developed using iSpring Suite 11 on integer material to enhance junior high school students’ mathematical literacy skills. The research employed a Research and Development (R&D) method using the ADDIE model. Data collection techniques included preliminary tests and interviews. The instruments used were mathematical literacy test items, interview guideline sheets, feasibility assessment sheets, and student response questionnaires. The data sources consisted of two subject matter experts, two instructional design experts, and two learning media experts who evaluated the technical quality of the media. Additionally, seventh-grade students of SMP Muhammadiyah Tasikmalaya were involved to assess the practicality of the developed media. The result of this study is an Android-based learning media application named MathReality. The feasibility of the media was evaluated based on content, design, and visual aspects. This learning media was declared highly feasible based on the questionnaire results, with assessment percentages of 84% from the subject matter expert, 93% from the instructional design expert, and 98% from the learning media expert. Furthermore, students showed very positive responses toward the practicality of the media, as indicated by a questionnaire result of 92%.
Pengaruh Pendekatan Realistic Mathematics Education (RME) Berbantuan GeoGebra Terhadap Kemampuan Penalaran Matematika Siswa Pada Materi Statistika Kelas X SMKN 6 Medan T.A 2025/2026 Dinda Saktiana Simanullang; Agusmanto Hutauruk; Samuel Juliardi Sinaga
De Fermat : Jurnal Pendidikan Matematika Vol. 9 No. 1 (2026)
Publisher : Program Studi Pendidikan Matematika, Fakultas Keguruan dan Ilmu Pendidikan, Universitas Balikpapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36277/defermat.v9i1.2508

Abstract

This study aims to determine the effect of the Realistic Mathematics Education (RME) approach assisted by GeoGebra on students' mathematical reasoning skills in statistics material in class X at SMKN 6 Medan. The research employed a quasi-experimental method, with a population consisting of all grade X students divided into 8 classes. The sample was selected using cluster random sampling, resulting in class X MPLB 1 as the experimental group and class X TKKR 2 as the control group. Data were collected using a mathematical reasoning skills test. Data analysis using normality, homogeneity, and t-tests showed a significant difference between the post-test scores of mathematical reasoning skills in the two classes, with a significance value (2-tailed) of 0.001 < 0.05. The average post-test score of the experimental class reached 53.50, while the control class was 45.50, indicating that the mathematical reasoning skills of students taught with the RME approach assisted by GeoGebra were higher than those taught with conventional learning. Based on the Effect Size (Cohen's d) calculation, a value of 0.633 was obtained, which means that the use of the Realistic Mathematics Education (RME) approach assisted by GeoGebra provides a contribution or effect in the medium category to students' mathematical reasoning skills.
Pengaruh Pembelajaran Etnomatematika Permainan Marsitekka Terhadap Pemahaman Konsep Matematika Siswa Pada Materi Transformasi Geometri Kelas XI SMK Negeri 6 Medan T.A 2025/2026 Septa Yesika Manurung; Agusmanto Hutauruk; Samuel Juliardi Sinaga
De Fermat : Jurnal Pendidikan Matematika Vol. 9 No. 1 (2026)
Publisher : Program Studi Pendidikan Matematika, Fakultas Keguruan dan Ilmu Pendidikan, Universitas Balikpapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36277/defermat.v9i1.2509

Abstract

This study aims to determine the effect of ethnomathematics-based learning using the Marsitekka game on students’ mathematical conceptual understanding in geometry transformation material for Grade XI students at SMK Negeri 6 Medan. This research employed a quasi-experimental method with a population consisting of all Grade XI MPLB students, comprising three classes. The sample was determined through cluster random sampling, resulting in class XI MPLB 3 as the experimental class and class XI MPLB 1 as the control class. Data were collected using a conceptual understanding test. Data analysis included normality, homogeneity test, and t-test showed a difference in posttest scores of conceptual understanding between the two classes, with a significance value (Sig. 2-tailed) of 0,023, which is less than 0,05 at a 5% significance level. The average posttest score of the experimental class was 66.93, while the control class was 60,10, indicating that students’ mathematical conceptual understanding was in the good category. Based on the calculation of Effect Size (Cohen’s d), the value obtained was 0,603, which indicates that ethnomathematics learning through the Marsitekka game has a moderate effect on students’ mathematical conceptual understanding
HUBUNGAN MATH ANXIETY DAN COMPUTATIONAL THINKING TINJAUAN SISTEMATIS DALAM PERSPEKTIF HIGHER ORDER THINKING SKILLS Nia Dahlia; Hepsi Nindiasari
De Fermat : Jurnal Pendidikan Matematika Vol. 9 No. 1 (2026)
Publisher : Program Studi Pendidikan Matematika, Fakultas Keguruan dan Ilmu Pendidikan, Universitas Balikpapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36277/defermat.v9i1.2515

Abstract

This study is motivated by the importance of higher order thinking skills (HOTS) and computational thinking (CT) in 21st-century mathematics education, as well as the affective factor of mathematics anxiety that may influence these abilities. The purpose of this study is to examine the relationship between mathematics anxiety and computational thinking skills, and to analyze the role of HOTS within this relationship through a systematic literature review (SLR) approach. The method follows the PRISMA model, including identification, screening, eligibility assessment, and data synthesis stages, involving 15 articles indexed in Scopus and Sinta, retrieved from Google Scholar (6 Scopus-indexed and 9 Sinta 1-4 indexed articles) published between 2021 and 2026. The findings indicate that most studies show a negative relationship between mathematics anxiety and CT, where increased anxiety is associated with lower computational thinking ability. However, this relationship is contextual and influenced by technology-based and innovative learning interventions. Furthermore, CT acts as a mediating variable that can reduce the negative impact of anxiety on learning outcomes, while HOTS functions as a cognitive framework linking affective and cognitive aspects. These findings highlight the importance of integrating CT and HOTS in mathematics learning to enhance students’ thinking quality while minimizing mathematics anxiety.
PENGARUH PENGARUH PENERAPAN MODEL PBL DAN INQUIRI DENGAN PENDEKATAN CTL TERHADAP KEMAMPUAN HOTS SISWA PADA MATERI SPLDV DIKELAS IX Rachel Cecilia Simarmata; Nizlel Huda; Roseli Theis
De Fermat : Jurnal Pendidikan Matematika Vol. 9 No. 1 (2026)
Publisher : Program Studi Pendidikan Matematika, Fakultas Keguruan dan Ilmu Pendidikan, Universitas Balikpapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36277/defermat.v9i1.2518

Abstract

This study is based on the low level of students' HOTS abilities at SMP Negeri 14 Kota Jambi, as well as the continued dominance of conventional teaching models. Based on this, the purpose of this study is to examine the use of Problem-Based Learning (PBL) and inquiry learning models combined with a contextual teaching and learning to improve ninth-grade students’ HOTS skills on the topic of Systems of Linear Equations in Two Variables. The research employed a posttest control group design. All ninth-grade classes constitute the population in this study. The samples included class IX F, which was taught using the PBL model with a real-life-based approach; class IX E, which used the inquiry learning model with a real-life-based approach; and class IX D as the control class, which applied a conventional learning model. Data were collected through observation sheets to assess the implementation of teacher and student activities, as well as through a posttest instrument measuring HOTS abilities. The results showed differences among the classes using the PBL model with a real-life-based approach, the inquiry model with a real-life-based approach, and the conventional model. The average posttest scores in the experimental classes I and II were 6.25 and 6.43 (high), while the control class only achieved an average score of 1.96 (low).
PENGETAHUAN LOKAL NELAYAN BUGIS DALAM ESTIMASI JARAK DAN WAKTU: KAJIAN ETNOMATEMATIKA PADA AKTIVITAS MELAUT Sri Wahyuni; Zulfiqar Busrah; Andi Aras; Azmidar Azmidar
De Fermat : Jurnal Pendidikan Matematika Vol. 9 No. 1 (2026)
Publisher : Program Studi Pendidikan Matematika, Fakultas Keguruan dan Ilmu Pendidikan, Universitas Balikpapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36277/defermat.v9i1.2521

Abstract

This study aims to uncover the concept of ethnomathematics in the practice of distance and time estimation in the fishing activities of Bugis fishermen on the coast of Cempae, Parepare City. The study used a qualitative approach with ethnographic methods. Data were obtained through participatory observation and in-depth interviews with three informants, then analyzed using the Spradley model which includes domain analysis, taxonomy, components, and cultural themes. The results show that fishermen utilize local knowledge in determining direction, distance, and time through natural signs such as islands, seabirds, water color, and the position of the sun (lettu esso ri ulunna). Four main domains were found, namely determining position using islands and seabirds as directional references, determining distance based on fishing experience, determining time through the position of the sun and weather conditions, and observing marine environmental conditions through water color and ocean currents. These four domains are interrelated in supporting fishermen's fishing activities. The cultural theme reveals the integration of local knowledge with mathematical concepts through measuring, counting, locating, and designing activities. The estimation carried out by fishermen remains relevant because it is contextual and adaptive.
Pengaruh Intensitas Penggunaan Media Sosial dan Kecerdasan Emosional terhadap Prestasi Belajar Matematika Siswa SMP Walisongo Muhimmatul Khoiroh; Yeva Kurniawati
De Fermat : Jurnal Pendidikan Matematika Vol. 9 No. 1 (2026)
Publisher : Program Studi Pendidikan Matematika, Fakultas Keguruan dan Ilmu Pendidikan, Universitas Balikpapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36277/defermat.v9i1.2522

Abstract

The purpose of this study is to analyze the influence of social media usage intensity and emotional intelligence on students’ mathematics achievement at Walisongo Junior High School. The social media platforms examined were TikTok and Instagram. This study employed survey and documentation methods as part of a quantitative approach. The population of this study consisted of all 51 students at Walisongo Junior High School. The social media usage intensity and emotional intelligence were measured using a questionnaire, while students’ mathematics achievement was measured based on odd semester final exam results. Data analysis was conducted using multiple linear regression analysis, but prior to this, normality and linearity tests were performed. The results of the data analysis yielded a Simultaneous Test (F-Test) with a significance level of 0.151 > 0.05, therefore, it can be concluded that H0 is accepted and H1 is rejected, meaning that there is no significant simultaneous influence of social media usage intensity (X1) and emotional intelligence (X2) on students’ mathematics achievement (Y) at Walisongo Junior High School. Thus, this study concludes that the variables of social media usage intensity and emotional intelligence do not have a significant influence, either partially or simultaneously, on students’ mathematics achievement
Desain Media Pembelajaran E-Modul dengan Pendekatan Culturally Responsive Teaching (CRT) Materi Kesebangunan dan Kekongruenan Mecca Evi Novianti; Dwi Sulistyaningsih; Venissa Dian Mawarsari
De Fermat : Jurnal Pendidikan Matematika Vol. 9 No. 1 (2026)
Publisher : Program Studi Pendidikan Matematika, Fakultas Keguruan dan Ilmu Pendidikan, Universitas Balikpapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36277/defermat.v9i1.2523

Abstract

The advancement of electronic systems necessitates modernization in mathematics learning to render it increasingly collaborative and aligned with scholars’ requirements. In execution, learning regarding the material of similarity and congruence at the junior high school tier continues encountering numerous obstacles, especially concerning pupils’ restricted theoretical grasp and the inefficient utilization of electronic learning media. This study aims to develop an e-module based on the Culturally Responsive Teaching (CRT) approach on similarity and congruence material that meets validity criteria as a learning resource. This investigation utilized a Research and Development (R&D) strategy employing the 4D framework, which was performed until the define, design, and develop phases. Evidence was gathered through verification forms finalized by media specialists and material authorities. The findings demonstrated that the e-module achieved a mean rating of 3.88 from media experts and 3.69 from material experts using a 1-4 scale, with an overall mean score of 3.78, which was categorized as highly valid. These outcomes signify that the produced e-module satisfies the viability benchmarks for application in learning. The produced e-module is anticipated to assist pupils in comprehending principles via dynamic learning exercises unified with the societal background of Nyadran. Subsequent exploration is advocated to scrutinize the usability and efficacy of the e-module within class execution.

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