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All Journal Jurnal Infinity AKSIOMA: Jurnal Program Studi Pendidikan Matematika AlphaMath: Journal of Mathematics Education Jurnal Elemen Eduma : Mathematics Education Learning and Teaching Al-Jabar : Jurnal Pendidikan Matematika Union: Jurnal Ilmiah Pendidikan Matematika JTAM (Jurnal Teori dan Aplikasi Matematika) Jurnal Pendidikan Matematika (Kudus) International Journal on Emerging Mathematics Education Malikussaleh Journal of Mathematics Learning (MJML) SJME (Supremum Journal of Mathematics Education) Jurnal Cendekia : Jurnal Pendidikan Matematika Jurnal Didactical Mathematics Jurnal Educatio FKIP UNMA Range : Jurnal Pendidikan Matematika BERNAS: Jurnal Pengabdian Kepada Masyarakat Pasundan International of Community Services Journal (PICS-J) Jurnal Dharma Bhakti Ekuitas Journal of Advanced Sciences and Mathematics Education International Journal of Educational Innovation and Research Edukasiana: Jurnal Inovasi Pendidikan Journal of Innovation and Research in Primary Education Prosiding Konferensi Nasional Penelitian Matematika dan Pembelajarannya Indonesian Journal of Islamic Education Journal of Education For Sustainable Innovation JRAMathEdu (Journal of Research and Advances in Mathematics Education) SANISKALA: Jurnal Pengabdian Masyarakat Profesi Pendidikan Dasar Jurnal Infinity Journal of Multidisciplinary Research and Development SJME (Supremum Journal of Mathematics Education) Papanda Journal of Community Service Jurnal Didaktik Matematika
Mohamad Gilar Jatisunda
Department Of Mathematics Education, Universitas Majalengka
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Pendampingan Guru Matematika SMA di Kabupaten Majalengka dalam Pemanfaatan Sumber Daya Digital untuk Pengembangan Profesionalisme Jatisunda, Mohamad Gilar; Hartanto, Ahmad Iqbal; Utami, Wulan Putri
Papanda Journal of Community Service Vol. 4 No. 1 (2025)
Publisher : Paguyuban Panalungtik Sunda (Papanda)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56916/pjcs.v4i1.2495

Abstract

Kegiatan pengabdian kepada masyarakat ini bertujuan untuk meningkatkan kompetensi digital guru Matematika SMA di Kabupaten Majalengka melalui pendampingan berbasis penguatan literasi digital. Metode yang digunakan meliputi workshop interaktif, coaching dan mentoring, serta evaluasi dan refleksi dengan pendekatan knowing–doing–reflecting. Hasil kegiatan menunjukkan adanya peningkatan signifikan dalam pemahaman literasi digital, keterampilan penggunaan aplikasi interaktif (GeoGebra, Desmos, Quizizz, dan Kahoot), serta kepercayaan diri guru dalam merancang RPP berbasis digital. Evaluasi menunjukkan bahwa 82% guru memperoleh keterampilan baru, 76% lebih percaya diri, dan 88% menilai program relevan dengan kebutuhan profesional mereka. Meskipun terdapat kendala teknis berupa keterbatasan perangkat dan jaringan internet, kegiatan ini terbukti mampu memperkuat profesionalisme guru Matematika serta meningkatkan kualitas pembelajaran. Program ini disarankan untuk dilaksanakan secara berkelanjutan guna menyesuaikan keterampilan guru dengan perkembangan teknologi pendidikan di era digital
Literasi Statistika Mahasiswa Adminitrasi Publik Jatisunda, Mohamad Gilar; Nahdi, Dede Salim; Suciawati, Vici
SJME (Supremum Journal of Mathematics Education) Vol 4 No 2 (2020): Supremum Journal of Mahematics Education
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Singaperbangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35706/sjme.v4i2.3488

Abstract

Kemampuan literasi statistika merupakan salah satu aspek pentingpembelajaran matematika yang perlu di kuasai oleh mahasiswa.Beberapa hasil studi menggambarkan kemampuan literasi satistikamasih belum memuaskan. Alternatif yang dapat meningkatkankemampuan literasi statsitika adalah penggunaan pembelajaranberbasis masalah. Tujuan dari penelitian untuk menganalisisperbadaan kemampuan literasi statistika dan implikasi terhadap prosespembelajaran. Penelitian ini menggunakan metode Pre-Eksperimentdengan tipe One-shot Case Study. Populasi penelitian ini adalahseluruh mahasiswa administrasi publik di Universitas Majalengka,dengan sampel sebanyak 60 orang. Penelitian ini menghasilkan adanyaperbedaan signifikan kemampuan lietarasi statistika. Implikasiterhadap proses pembelajaran berbasis masalah, penting untukmempersiapkan materi ajar yang berdasarkan kebutuhan siswa tidakhanya sebatas bagaimana membuat aktivitas siswa mengkontruksipengetahuannya.
Praxeological analysis of junior secondary students’ epistemological obstacles in algebraic operations Jatisunda, Mohamad Gilar; Hoon, Teoh Sian; Jamilah, Jamilah; Rohimatunissa, Dela
JRAMathEdu (Journal of Research and Advances in Mathematics Education) Volume 10, Issue 4, October 2025
Publisher : Lembaga Pengembangan Publikasi Ilmiah dan Buku Ajar, Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/jramathedu.v10i4.13374

Abstract

This study investigates junior secondary students’ epistemological obstacles to learning algebraic operations through a praxeological framework grounded in the Anthropological Theory of the Didactic (ATD), with Didactical Design Research (DDR) as the conceptual orientation. Diagnostic algebra tasks and semi-structured interviews were administered to six seventh-grade students in Indonesia to examine their algebraic techniques and justifications. Students’ written and verbal responses were analysed by reconstructing tasks (T), techniques (τ), technologies (θ), and theories (Θ). The findings reveal that students generally exhibit procedural fluency in routine tasks, such as simplification and distributive expansion. However, substantial epistemological obstacles arise in tasks that require justification, relational interpretations of equality, variable generalisation, and contextual transfer. These obstacles are characterised by a misalignment between students’ correct techniques and weak or absent justificatory discourse, indicating that procedural correctness does not consistently reflect conceptual understanding. This study contributes to mathematics education by offering a fine-grained praxeological analysis that makes epistemological obstacles often overlooked in error-based analyses visible. By distinguishing students’ actions from their justifications, the study clarifies the structural nature of algebraic difficulties and identifies instructional directions that emphasise relational equality, explicit justification, and stable conceptions of variables to support deeper structural and theoretical understanding of algebra.
Students Learning Processes on Measures of Central Tendency in Senior High School Classrooms Based on the Theory of Didactical Situations Wulan Putri Utami; Mohamad Gilar Jatisunda
Didaktik Matematika Vol 12, No 2 (2025): October 2025
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jdm.v12i2.48250

Abstract

In the current data-driven society, developing a deep understanding of statistical concepts is essential for students to interpret and communicate quantitative information effectively. This study explores how students construct a sense of the measures of central tendencymean, median, and modethrough interactions within didactical situations designed according to the Theory of Didactical Situations (TDS). Using an exploratory case study, sixteen tenth-grade senior high school students participated in two instructional sessions structured around five TDS phases: devolution, action, formulation, validation, and institutionalisation. Data were collected through observations, video recordings, written work, and field notes, and analyzed using deductive content analysis guided by the TDS framework. The findings reveal that learning structured around TDS phases fosters the emergence of intuitive strategies and promotes conceptual understanding of mean, median, and mode. Students gradually shifted from procedural computation toward reflective reasoning and contextual interpretation. This study contributes to mathematics education by demonstrating how TDS-based instruction can foster epistemic autonomy and conceptual growth in statistical learning
Implementing Problem-Based Learning to Enhance Students' Mathematical Proficiency in Primary School Ujiati Cahayaningsih; Mohamad Gilar Jatisunda; Dede Trie Kurniawan; Dede Salim Nahdi; Wulan Putri Utami; Rahma Halipah
Didaktik Matematika Vol 10, No 2 (2023): October 2023
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jdm.v10i2.32615

Abstract

Primary school students' mathematical proficiency is crucial to their academic progress. However, many students still struggle to understand math, especially fractions. This study examines how Problem-Based Learning (PBL) improves primary school students' mathematical proficiency. The study employed a quasi-experimental approach to investigate the effects of PBL academic achievement. The experimental group received PBL, while the control group received expository teaching. This study selected 54 students from two primary schools using purposive sampling. The experimental group consisted of 28 students, and the control group had 26. Students' mathematical proficiency was tested pre-and post-intervention.The findings reveal a significant improvement in mathematical proficiency in the experimental class exposed to PBL, as indicated by the independent samples t-test. The two-way ANOVA underscores the interaction influence of PBL and Early Mathematics Skills (EMS) factor on improving mathematical proficiency, supported by a high R-squared value (0.941). It suggests that PBL explains a substantial portion of the observed diversity in mathematical proficiency. The quasi-experimental approach has limitations, and the study shows that PBL improves mathematical proficiency. The study's quasi-experimental characteristics and potential lack of generalizability are acknowledged. While recognizing students' starting EMS, educators and policymakers should incorporate PBL into mathematics instruction, especially for complex concepts like fractions
Pythagorean Theorem Concept Image in Junior High School: An Analysis in The Online-Based Learning Mohamad Gilar Jatisunda; Vici Suciawati; Dede Salim Nahdi
Didaktik Matematika Vol 8, No 2 (2021): Jurnal Didaktik Matematika
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jdm.v8i2.21902

Abstract

The concept image comprises all the cognitive structures in an individual's mind connected with a specific notion. However, if the learning situation is not relevant to help students construct knowledge and provide meaningful experiences, it will affect their concept image. This study aims to examine the concept of the image of the Pythagorean theorem during online-based learning. The research is a qualitative approach, and the method is phenomenological to understand the meaning for the participants of their concept image. Initially, this study enrolled 66 students. Two students were selected as research subjects and acted as resource persons to provide adequate contextualization based on students who answered right and wrong. Data collection combines data from the outcomes of testing the Pythagorean theorem test, interviews, and literature studies. The data analysis technique employed is Interpretative Phenomenological Analysis (IPA). There are six categories of student concept image. Based on in-depth interviews with two students who answered correctly and incorrectly, students were given inconsistent meanings of the Pythagorean theorem due to the learning situation to improve students' understanding of the subject.
Student’s Mathematical Problem Solving Skills and Self-Efficacy on Word Problems through Technology-Based Learning Arif Saefuloh, Nandang; Gilar Jatisunda, Mohamad; Syofiana, Mardiyah; Mulyanti, Yanti
RANGE: Jurnal Pendidikan Matematika Vol. 7 No. 2 (2026): Range Januari 2026
Publisher : Pendidikan Matematika UNIMOR

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32938/jpm.v7i2.10322

Abstract

Students’ ability to solve mathematical word problems is closely linked to their mathematical problem-solving skills and self-efficacy. This study examines the influence of two technology-based learning approaches—synchronous learning (via Zoom and Google Meet) and asynchronous learning (via WhatsApp)—on students' problem-solving performance and self-efficacy levels. The research involved 27 seventh-grade students in Bandung and employed a mixed-method design with an explanatory sequential approach. The findings revealed a strong relationship between the type of technology-mediated learning and students’ self-efficacy in mathematical problem solving. Students who engaged in synchronous learning demonstrated better performance in interpreting problems, developing strategies, and justifying solutions compared to those who used asynchronous methods. Learners with moderate to high self- efficacy consistently outperformed those with low self-efficacy, particularly in identifying relevant information, making conjectures, and generalizing patterns. In contrast, students with low self-efficacy showed difficulties in solving word problems and exhibited limited use of key processes in problem solving. These results emphasize the importance of aligning instructional approaches with students' self-efficacy levels and providing structured support for students involved in asynchronous learning to strengthen their mathematical problem-solving abilities.
Didactical Situations and Learning Obstacles in Geometric Sequences among High School Students Utami, Wulan Putri; Jatisunda, Mohamad Gilar; Juraev, Davron Aslonqulovich; Azman, Mohamed Nor Azhari
AlphaMath : Journal of Mathematics Education Alphamath: Vol. 12, No. 1, May 2026
Publisher : Department of Mathematics Education, Universitas Muhammadiyah Purwokerto, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30595/alphamath.v12i1.30595

Abstract

This study examines didactic situations by integrating an analysis of students’ learning obstacles in mathematics education, particularly on geometric sequences, which remains a persistent source of conceptual difficulty for students. The purpose of this study is to analyze didactic situations based on the Theory of Didactical Situations and to identify the types and emergence of students’ learning obstacles within each stage of the learning process. A descriptive qualitative approach was employed involving 36 eleventh-grade students divided into six groups. Data were collected through classroom observations, conceptual tests, and semi-structured interviews and analyzed using data reduction, data display, and conclusion-drawing techniques. The findings show that all stages of the Theory of Didactical Situations—action, formulation, validation, and institutionalization—were implemented systematically, each characterized by distinct patterns of students’ activities and interactions with the milieu. Nevertheless, students still encountered ontogenic obstacles during the action phase related to readiness and confidence, epistemological obstacles during the formulation phase in the form of misconceptions and difficulties in identifying multiplicative patterns, and didactical obstacles during the validation phase, characterized by limited participation and weak argumentative skills in discussions. These results indicate that learning obstacles are closely associated with the characteristics of each stage of the didactical situation. This study contributes an integrated analysis linking didactic situations with the emergence of students’ learning obstacles at each stage of the TDS through interactions with the milieu. The findings emphasize the importance of adaptive, student-centered instruction to strengthen conceptual understanding and reduce obstacles to learning in mathematics.
Integrating Silih Asah, Silih Asih, and Silih Asuh in Primary School Character Education Ansori, Yoyo Zakaria; Agustin, Mubiar; Jatisunda, Mohamad Gilar; Azman, Mohamed Nor Azhari
Profesi Pendidikan Dasar Vol. 12, No. 3, December 2025
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/ppd.v12i3.12143

Abstract

Character education is a foundational pillar in students' moral and social development, particularly at the primary education level. This study examined the role of Sundanese local wisdoms silih asah (mutual enlightenment), silih asih (mutual affection), and silih asuh (mutual care) in shaping students' character across the cognitive, affective, and behavioural dimensions. A qualitative case study design was employed to enable an in-depth exploration of how these values are integrated into the learning ecosystem of a public primary school in Nunuk Baru Village. Data were collected through classroom observations, in-depth interviews, and document analysis conducted within the school setting. Qualitative data were systematically analyzed using NVivo software to support coding, thematic analysis, and data triangulation. The findings indicate that teacher empathy accounted for 30% of compassion-based interactions, peer support behaviours emerged in 25% of observed incidents, and practices reflecting silih asuh, such as a buddy system, were documented 21 times. In addition, spontaneous acts of care and active participation in extracurricular communal activities reflected the authentic internalization of these values. This study highlights the importance of embedding local wisdom into formal schooling as a sustainable approach to fostering prosocial behaviour and strengthening students' moral resilience amid the challenges of globalization.
Indonesian grade 11 students’ conceptual difficulties with measures of central tendency: An nvivo-assisted qualitative study of representativeness, visualization, and decision making Nur haeni, Puput Indriyani; Jatisunda, Mohamad Gilar
Journal of Advanced Sciences and Mathematics Education Vol. 6 No. 1 (2026): Journal of Advanced Sciences and Mathematics Education
Publisher : CV. FOUNDAE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58524/jasme.v6i1.1072

Abstract

Background: Conceptual understanding is essential in statistics learning, especially measures of central tendency, because it supports students’ ability to represent, interpret, and make data-based decisions. Aims: This study identifies patterns of students’ conceptual difficulties in measures of central tendency across basic concepts, data visualization, data interpretation, and decision making. Methods: A qualitative descriptive case study involved 33 eleventh-grade students from a public senior high school. Data came from a written test and semi-structured interviews with six purposively selected students. Responses were analyzed using NVivo-assisted inductive open coding. Trustworthiness was supported through data-source triangulation, peer debriefing, and an audit trail. Result: Twenty-two initial codes were synthesized into four themes: understanding basic concepts, data visualization, data interpretation, and Application and decision making. Difficulties were most prominent in viewing central tendency as a representative value, constructing histograms and line plots, and justifying contextual decisions. Common misconceptions included computing the mean as “total frequency ÷ number of categories” and treating histogram tasks as table rewriting rather than graph construction. Overall, the pattern suggests a plausible progression linking conceptual understanding with representational and interpretive demands. Conclusion: Students’ difficulties are interrelated and conceptually driven; instruction should emphasize representativeness, multiple representations, and evidence-based reasoning.
Co-Authors Abdur Rasyid Abdur Rasyid, Abdur Amelia, Rosa Anda Juanda Ansori, Yoyo Zakari Ansori, Yoyo Zakaria Arif Saefuloh, Nandang Azman, Mohamed Nor Azhari Dadang Sudirno Dede Salim Nahdi Dede Salim Nahdi Dede Trie Kurniawan Dela Rohimatunnisa Didi Suryadi Erik Santoso Febriana, Dea Sekar Ayu Fitriyani, Dea Hani Sri Mulyani Hartanto, Ahmad Iqbal Ida Nuraida Iik Nurhikmayati Iik Nurhikmayati, Iik Ipin Aripin Ira Nurlatifah Ismayanti, Syifa Jamilah Jamilah Julia, Rida Juraev, Davron Aslonqulovich Lita Lita Lita Lita Lita, Lita Maria Hidayanti MARIA HIDAYANTI, MARIA Moh Salimi Mubiar Agustin Nengsih, Rina Nia Kania Nunuy Ratnawulan Nur haeni, Puput Indriyani Nurhanifah Nurhanifah Nurudin Araniri Rahma Halipah Rahmatudin, Jajang Ramadhan, Dadan Ratna Hidayah Riepah, Ipah Rohimatunissa, Dela Rohimatunnisa, Dela Rosidah, Ani Saefuloh, Nandang Arif Santoso, Erik Silfi Audina Sudianto Sudianto Sudirno, Dadang Sufyani Prabawanto, Sufyani Suryaningsih, Yeni Syofiana, Mardiyah Teoh Sian Hoon Ujiati Cahayaningsih Ujiati Cahyaningsih Umbara, Uba Umbara, Uba Utami, Wulan Putri Vici Suciawati Wiguna, Siska Adi Wiranegara, Relifa Wulan Putri Utami Yanti Mulyanti, Yanti Yeni dwi Kurino