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All Journal International Journal of Evaluation and Research in Education (IJERE) Widya Wacana : Jurnal Ilmiah Journal of Education and Learning (EduLearn) AdMathEdu : Jurnal Ilmiah Pendidikan Matematika, Ilmu Matematika dan Matematika Terapan Jurnal Infinity PYTHAGORAS: Jurnal Program Studi Pendidikan Matematika Journal of Research and Advances in Mathematics Education Al-Jabar : Jurnal Pendidikan Matematika Math Didactic: Jurnal Pendidikan Matematika Jurnal Matematika Sains dan Teknologi JOHME: Journal of Holistic Mathematics Education Syntax Literate: Jurnal Ilmiah Indonesia ELSE (Elementary School Education Journal) : Jurnal Pendidikan dan Pembelajaran Sekolah Dasar Jurnal SOLMA BAREKENG: Jurnal Ilmu Matematika dan Terapan Jurnal PAJAR (Pendidikan dan Pengajaran) Pendas : Jurnah Ilmiah Pendidikan Dasar Jurnal Pendidikan Matematika Raflesia JMM (Jurnal Masyarakat Mandiri) JTAM (Jurnal Teori dan Aplikasi Matematika) Journal of Education and Instruction (JOEAI) Alignment: Journal of Administration and Educational Management NUSANTARA : Jurnal Ilmu Pengetahuan Sosial Jurnal Cendekia : Jurnal Pendidikan Matematika Jurnal Pengabdian Hukum Indonesia (Indonesian Journal of Legal Community Engagement) JPHI Journal on Education JOURNAL OF SCIENCE AND SOCIAL RESEARCH Neraca: Jurnal Pendidikan Ekonomi Jurnal Pendidikan Gema Wiralodra Abdi Wiralodra : Jurnal Pengabdian Kepada Masyarakat Coopetition : Jurnal Ilmiah Manajemen Madaniya Jurnal Pengabdian kepada Masyarakat Nusantara Journal of Research in Mathematics Trends and Technology Tolis Ilmiah: Jurnal Penelitian Jurnal Math-UMB.EDU Jurnal Pendidikan dan Pembelajaran Indonesia (JPPI) Jurnal Pendidikan JagoMIPA: Jurnal Pendidikan Matematika dan IPA SCIENCE : Jurnal Inovasi Pendidikan Matematika dan IPA Dharmas Education Journal (DE_Journal) Jurnal Ekonomi Jurnal Pengabdian Kepada Masyarakat Patikala Journal of Education Research Jurnal Impresi Indonesia Nurse and Holistic Care Edukasia: Jurnal Pendidikan dan Pembelajaran Jurnal Pendidikan Dasar Serulingmas Health Journal (SHJ) Ranah Research : Journal of Multidisciplinary Research and Development NeoRespublica : Jurnal Ilmu Pemerintahan International Journal of Law, Policy and Governance Polyhedron International Journal in Mathematics Education International Journal of Didactic Mathematics in Distance Education Jurnal Infinity Journal on Mathematics Education
Yumiati
Universitas Terbuka
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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 Amin Fauzi, Amin Andi Bagus Prabowo Antasari, Melisa Ardi Dwi Susandi Arif Rahman Arif Rahman Asrofi, Asrofi Baihaqi Bakkara, Reno Delison Bambang Avip Priatna Martadiputra cakrawala Belman Mangapul R Horbo Bonyah, Ebenezer Cecep Anwar Hadi Firdos Santosa Chandra, M Jeffri Arlinandes Cicih Cahtini Danial, T Ahmad Darmawati, Ratna Derlina Zai Deswita Deswita Dewi Putri Yuni Dewi Setianingsih Diana, Meli Dwi Susilo Dwita Hadisyahputra Endang Wahyuningrum Erni Erni Ervina Estu Puji Handayani Fachruzzaman - Faizah, Siti Fanni Zulaiha Fitri, Rahma Hadisyahputra, Dwita Haji, H Saleh Harry Dwi Putra, Harry Dwi Hasnawati Hasnawati Hasratuddin Hasratuddin Hasratuddin Hasratuddin Heriady Gultom Hermawan Gatot Priyadi Hertono, Gatot Fatwanto Horbo, Belman Mangapul R Idha Novianti Iin Herlena H Ike Kuswardani Ike Kuswardani Irawan, Sam Rizky Isnawan, Muhamad Galang Jackson Pasini Mairing Jamaris Jamaris Junaidi Junaidi Jusniani, Nia Kartono , Kosim Kosim Kosim Kosim Kusuma Wijaya Ridi Putra Leni Marlina loly nurfianto Lukman Samboteng & Rulinawaty Kasmad M Ilham Abdullah Mardiana Zulfa Marselino Fransye Giovani Sundah Masli Hartati Merry Noviyanti Merrydian, Siska Mery Noviyanti Muhamad Dawam Raihan Mulyana, Anna mustikaningsih, Dian Natalia Prabandari Nofrizal Nofrizal Nopiana Yuda, Nina Novianti, Idha Novita Tri Suci Sihotang Noviyanti, Merry Nunuk Suryani Nunuk Suryani Nurhaedi, Edy Nurita Angesti Rahayu Paris, Ramli Paulus Junico Pasaribu Pauzan, Muh Pradestya, Rakha R. Bambang Aryan Soekisno Ramadhani, Muhammad Redo Andi Marta, Redo Andi Reni Zulfitri Riesmiyatiningdyah, Riesmiyatiningdyah Rina Rina Farida Riyan Hidayat Rodríguez-Nieto, Camilo Andrés Rohmah, Fatkur Sabil, Ibnu Saleh Haji Saputra, Dimas Septian Saputro, Yongki Budi Selly Anastassia Amellia Kharis Sembiring, Gorky Sembiring, Maximus Gorky Sendi Ramdhani Setyowati, Dina Putri Sihombing, Lucia Sisilia Malau Sony Aditya Pratama Sudirman Sudirman Sudirman Sudirman Sugeng Sutiarso Sugeng Sutiarso Sugilar, Sugilar Sumiati, Ketut Suroyo Suroyo Susandi, Ardi Syafdi Maizora Tarhadi Tatag Yuli Eko Siswono Tian Abdul Aziz Tri Dyah Prastiti Triwahyuni, Lina Wijaya, Tommy Tanu Wijayanti, Dini Prastyo Wijayanti, Nina Windari, Windari Wiyani, Novan Ardiy Yaya Kusumah Yaya S. Kusumah Yulitasari, Eka Zahra, Nurul Izah Zamzaili Zamzaili Zamzaili Zamzaili Zamzaili Zamzaili Zamzaili, Zamzaili Zamzaili, Zamzaili Zedderita, Hellena Zulfa, Mardiana