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All Journal SAINSMAT Jurnal Kreatif Tadulako Online Jurnal Pendidikan Biologi Indonesia QUANTUM: Jurnal Inovasi Pendidikan Sains Indonesia Chimica Acta JOIV : International Journal on Informatics Visualization Jurnal Penelitian Pendidikan IPA (JPPIPA) Jambura Journal of Educational Chemistry Abdi Dosen : Jurnal Pengabdian Pada Masyarakat Diseminasi : Jurnal Pengabdian kepada Masyarakat Journal of Applied Science, Engineering, Technology, and Education Journal On Teacher Education (Jote) Jurnal Pengabdian kepada Masyarakat Nusantara SPIN: Jurnal Kimia & Pendidikan Kimia Mattawang: Jurnal Pengabdian Masyarakat JINAV: Journal of Information and Visualization Quantitative Economics and Management Studies Panrannuangku Jurnal Pengabdian Masyarakat EduLine: Journal of Education and Learning Innovation Daengku: Journal of Humanities and Social Sciences Innovation ARRUS Journal of Mathematics and Applied Science SAINSMAT: Journal of Applied Sciences, Mathematics, and Its Education Media Eksakta Journal of Disruptive Learning Innovation (JODLI) al-fikrah: Jurnal Manajemen Pendidikan Satwika: Jurnal Pengabdian kepada Masyarakat Journal of General Education and Humanities SAINSMAT: Jurnal Ilmiah Ilmu Pengetahuan Alam Arfak Chem: Chemistry Education Journal ATHENA: Journal of Social Culture and Society Tadibia Islamika: Journal of Holistic Islamic Education Tatar Pasundan: Jurnal Diklat Keagamaan Al-khidmah: Jurnal Pengabdian dan Pendampingan Masyarakat SEARCH: Science Education Research Journal of Education, Social & Communication Studies Golden Age and Inclusive Education EDUTREND: Journal of Emerging Issues and Trends in Education Journal of Chemistry Sciences and Education Jurnal Pendidikan MIPA SINORA: Jurnal Sosial dan Humaniora
Dewi Satria Ahmar
Department Of Chemistry Education, Faculty Of Teacher Training And Education, Tadulako University, Palu, Indonesia
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Two-Tier Diagnostics for Evaluating Submicroscopic Representations in Stoichiometry Azzajjad, Muhammad Fath; Ahmar, Dewi Satria; Kilo, Ahmad Kadir
Jambura Journal of Educational Chemistry Vol 8, No 1 (2026): February
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jjec.v8i1.36488

Abstract

Stoichiometry is a fundamental concept in chemistry that requires students to coordinate symbolic calculations with submicroscopic representations of particles and reactions. However, previous studies consistently show that students often rely on algorithmic procedures without developing coherent particle-level reasoning, leading to persistent misconceptions. This representational gap remains a major challenge in Basic Chemistry instruction. Therefore, this study aimed to examine the effectiveness of audiovisual-supported Problem-Based Learning (PBL) in enhancing students’ submicroscopic representational ability in stoichiometry using a two-tier diagnostic approach. A quasi-experimental design with a posttest-only comparison was employed involving 33 undergraduate students enrolled in a Basic Chemistry course. Participants were divided into two groups with equivalent initial ability distributions: an experimental group receiving PBL integrated with audiovisual media (n = 16) and a control group receiving PBL without audiovisual support (n = 17). Students’ submicroscopic understanding was measured using a two-tier multiple-choice diagnostic test assessing both response accuracy and particle-level reasoning. Data were analyzed through descriptive statistics, diagnostic category profiling, and effect size estimation. The results reveal that the experimental group demonstrated substantially higher levels of coherent submicroscopic representation and significantly lower misconception rates than the control group. Learning gains were consistent across all stoichiometry subtopics, with particularly strong effects observed in relational and inferential tasks such as particle ratio interpretation and limiting-reactant reasoning (Cohen’s d = 1.41). These findings indicate that audiovisual-supported PBL effectively facilitates students’ transition from procedural problem solving to meaningful particle-level understanding. The study underscores the importance of integrating representationally rich instructional media and diagnostic assessments to promote deeper conceptual learning in stoichiometry and chemistry education.
Refining Pedagogical Skills in LS-Driven TP: Insights into PSCST’s Professional Competence Sabang, Sri Mulyani; Paloloang, Muhammad Fachri B.; Werdhiana, I Komang; Syukur, Muh. Syarif S. Abd.; Ahmar, Dewi Satria; Azzajjad, Muhammad Fath
Jurnal Penelitian Pendidikan IPA Vol 12 No 2 (2026)
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v12i2.13702

Abstract

This quantitative study examines the impact of a teaching practicum, integrated with Lesson Study, on the pedagogical competency of 93 pre-service science teachers in the Pendidikan Profesi Guru (PPG) program at Universitas Tadulako, Indonesia.  This study is a quantitative survey using purposive-stratified sampling (N = 93 PPG teachers). The data relied on self-assessment questionnaires, risking subjective bias. The intervention included iterative Lesson Study cycles (Plan–Do–See–Reflection). Practically, the results support LS-based practicum improvement, but generalization is limited to similar PPG contexts and regional settings. Data were gathered using self-assessment questionnaires and bolstered by Lesson Study, using a validated 5-point Likert-scale instrument that was aligned with the four phases of Lesson Study (Plan, Do, See, Reflection). The findings supported H₁ and rejected H₀, indicating a high level of general pedagogical competency (M = 3.62, SD = 0.45).  Plan (M = 3.67) and Do (M = 3.65) phases showed strengths, especially in ICT integration and conceptual clarity, while See (M = 3.55) and Reflection (M = 3.58) phases showed relative deficiencies.  Regression analysis revealed that Reflection ratings significantly predicted overall competency (β = 0.32, p < 0.001, R² = 0.28), and repeated-measures ANOVA validated significant phase differences (F (3,276) = 4.82, p = 0.003, η² = 0.05). The results demonstrate how well Lesson Study promotes evidence-based pedagogical development, particularly through iterative reflection, and provide empirical evidence in favor of its broader implementation in Indonesian PPG programs to improve science teacher training in areas with limited resources. This study contributes theoretically by operationalizing PSCST-based pedagogical competence within a Lesson Study framework.
Co-Authors Aan Febriawan Abdul Kamaruddin Abdur Rahman Arif Aceng Haetami, Aceng Adwi Restafara Afadil Agus Nasir Agus Nasir, Agus Agussatriana Ahmad Kadir Kilo Ahmar, Ansari Saleh Alifa, Nur Alifta Alifta Alimuddin Alimuddin Anang Wahid M.Diah Andi Saadillah Anggreni, Afrillia Anggriani, Windi Arwansyah Arwansyah Arwansyah Ayu Kusumawati Ayu Rahayu Ayu Rahayu Azzajjad, Muhammad Fath Dewi Natalia Marpaung Dian Permana Eko Hariyadi Esterlina Marpaung, Meida H Halima Hanisa, Siti Haris Munandar Hayyatun Mawaddah Hijrinia Kusumaning Ayu I Komang Werdhiana Ifriana, Ifriana Ilimu, Edi Iyan Nurdiyan Haris Jamaludin M Sakung Jesi Jecsen Pongkendek Jesi Jecsen Pongkendek Jesi Jecsen Pongkendek Karina Nadya Sirajuddin Kasmudin Mustapa Khusna Arif Rakhman, Khusna Arif Lilies N Tangge Magfirah Magfirah Magfirah Magfirah Magfirah Magfirah, Magfirah Manalu, Yessi Febianti Mardiana Marpaung, Dewi Natalia Metoli, Erwin Priscal Miswandi Tendrita Mohammad Jamhari Muh. Syahrir Muhammad Ismail Muhammad Ismail Muhammad Zikra Musdalifatul Adewia Mustafa, Linda Kurnia Neks Triani Nur Anisa Nur Azizah Nur Jannah Baturante Nurfadila, Safna Nurfatimah Sugrah Nurfianti Nurul Inayah Paloloang, Muhammad Fachri B. Pathuddin Patmasari, Andi Poba, Detris Pongkendek, Jesi Jecsen Purnama Ningsih Rahim, Fazly Rahman, Nurul Aulia Rahmatia, Sitti Ratman Ratman Ratman Riadhatul Ulum Rizki, Nur Riani Roy Kulyawan Ruslin Hadanu Sangkota, Vivi Dia A. Sari, Nurita Sari, Sintya Puspita Sely Artasasta Lawongo Siti Nuryanti Sitti Rahmatia Sitti Rahmawati Sri Hastuti Virgianti Pulukadang Sri Muliani, Sri Sri Mulyani Sabang Sudir Umar Suherman Suherman, Suherman sukmawati Sukmawati Sukmawati Supriadi Supriadi Syafitri, Dhini Syahrir, Muh. Syukur, Muh Syarif S Abd Tonio, Sarinah Emilia Tri Santoso Tri Santoso Tri Santoso Tukaedja, Sindi Velesia Vivi Dia A Sangkota Wahab, Zamil Wilda Utami WINARSIH Yasin, Yusril Zulkifli Zulkifli