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All Journal International Journal of Evaluation and Research in Education (IJERE) JURNAL PENELITIAN ILMU PENDIDIKAN KONSELI: Jurnal Bimbingan dan Konseling (E-Journal) Jurnal Ilmiah Pendidikan Dasar Emerging Science Journal JURNAL PENDIDIKAN TAMBUSAI Sakina: Journal of Family Studies JOURNAL OF INFORMATION SYSTEM RESEARCH (JOSH) Jurnal Math-UMB.EDU Devotion: Journal of Research and Community Service Kognitif: Jurnal Riset HOTS Pendidikan Matematika Media Publikasi Promosi Kesehatan Indonesia (MPPKI) Jurnal ARTI : Aplikasi Rancangan Teknik Industri Jurnal Sains dan Teknologi Maddah : Jurnal Komunikasi dan Konseling Islam Jurnal Nusantara Madani Amorti: Jurnal Studi Islam Interdisipliner International Journal of Essential Competencies in Education (JUMPER) AI dan SPK : Jurnal Artificial Intelligent dan Sistem Penunjang Keputusan Kreano, Jurnal Matematika Kreatif Inovatif Journal of Accounting Law Communication and Technology Innovative Journal of Educational Research and Insights (IJERI) Jurnal Pendidikan MIPA Jurnal Pendidikan Progresif Indonesian Journal of Auditing and Accounting Journal on Mathematics Education
Riyan Hidayat
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Journal : journal on mathematics education

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Operationalizing didactical situation-based online learning to support eighth-grade students’ mathematical reasoning and understanding in geometry: Participatory design research Sudirman; Rodríguez-Nieto, Camilo Andrés; Hidayat, Riyan; Isnawan, Muhamad Galang; Pauzan, Muh; Yumiati; Martadiputra, Bambang Avip Priatna; Faizah, Siti
Journal on Mathematics Education Vol. 17 No. 1 (2026): Journal on Mathematics Education
Publisher : Universitas Sriwijaya in collaboration with Indonesian Mathematical Society (IndoMS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22342/jme.v17i1.pp43-68

Abstract

Mathematics education continues to encounter enduring challenges in fostering students’ mathematical reasoning and conceptual understanding, particularly in geometry, where learning frequently remains procedural and empirically driven. This study reports a participatory design research (PDR) project that operationalized a Didactical Situation–Based Online Learning (DS-OL) approach to enhance eighth-grade students’ mathematical reasoning (MR) and understanding (MU) in the topic of lines and angles. The research involved 120 students and 16 mathematics teachers, implemented through four iterative PDR phases: co-exploration, co-design, iterative implementation, and collaborative analysis. Diagnostic findings from the co-exploration phase indicated a predominance of instrumental understanding and empirically or authority-based reasoning, informing critical design decisions. During the co-design phase, principles from the Theory of Didactical Situations were transformed into online learning components structured around action, formulation, validation, and institutionalization, and were iteratively refined across two implementation cycles. Across these cycles, significant improvements were observed in students’ MR and MU, including marked pre–post gains (mean scores increasing from 65.00 to 83.79; Cohen’s d = 2.60) and shifts toward more deductive reasoning and relational understanding. Framed within a design-based epistemology, these findings are interpreted as design-supported enhancements rather than evidence of causal effectiveness. The study contributes to design-based knowledge by articulating empirically grounded principles for operationalizing didactical situations within online geometry learning environments.
Co-Authors Abdillah, Muhammad Dimas Akbar, Ahnaf Chaisar Ali Ikhwan Alisya, Dwi Andi Thahir Andrian, Dedek Anggoro, Abdurrobbil Falaq Dwi Ar Rasyid, Abdul Hafizh Ardiyansyah, Agung Ariyadi Wijaya Azmi Pohan, Wulan Bambang Avip Priatna Martadiputra cakrawala Bambang Eko Susilo Dacara, Editha Damar Rais Dhoriva Urwatul Wutsqa EFENDI Effendi, Leo Adhar Evendi, Erpin Faizah, Siti Hapsari, Aprilia Putri Harahap, Subur Hayatun Nufus Hermandra, . Heryjanto, Andreas Ika Mustika Dewi Indrayana, Indrayana Irfan Wahyu Prananto Isnawan, Muhamad Galang Layalin, Nurhuda Alfina Liu, Sibo Lonek, Nurul Azizah Loska, Febri Mardhotillah, Bunga Maulana, Dimas Krisna Mohd Saad, Mohd Rashid Muhamad Alda Oemara Syarif, Amiroel Pauzan, Muh Perani Rosyani Ramadani, Mega Melani Ramadhani, Deswara Varen Ratih Devi Alfiana Rayhannur, Muhammad Jaffar Rezi Ariawan Risnawati Risnawati Rodríguez-Nieto, Camilo Andrés Samutri, Erni Saputra, Juni Scolastika Mariani Sinaga, Imam Adlin Sindi Amelia, Sindi Siti Maisaroh Siti Nurhalimah Song, Fabian Jason Sudirman Supratama, Riky Surbakti, Gita Syahfitri Wulandari Suripah Suripah Tarigan, Tasya Ika Saylani Tommy Tanu Wijaya Tubagus Pamungkas Wahyuni, Dina Auliatil Wahyuni, Reni Wardono Wardono Wawan Juandi Yumiati Zetriuslita Zubaidah Amir MZ