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All Journal Prisma Sains: Jurnal Pengkajian Ilmu dan Pembelajaran Matematika dan IPA IKIP Mataram Journal of Research in Science and Mathematics Education
Dewi Kristika Findia Ning Tyas
Cenderawasih University
Biochemistry, Genetics & Molecular Biology Chemistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Mathematics Physics Other

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Mathematical Communication of Vocational High School Students in Solving Papuan Ethnomathematics-Based Problems Dewi Kristika Findia Ning Tyas; Marthinus Y. Ruamba; Ririn Dwi Agustin; Pujilestari Pujilestari
Prisma Sains : Jurnal Pengkajian Ilmu dan Pembelajaran Matematika dan IPA IKIP Mataram Vol. 14 No. 1: January 2026
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/j-ps.v14i1.17783

Abstract

This study examines how Indonesian vocational high school (SMK) students communicate mathematically while solving systems of three-variable linear equations (SPLTV) embedded in Papuan ethnomathematical contexts. Using a qualitative descriptive design, the study involved ten Grade 10 students representing ten vocational departments. Data were collected through students’ written solutions to ethnomathematics-based SPLTV tasks (e.g., contexts involving culturally familiar objects such as noken and local economic practices) and follow-up semi-structured interviews intended to clarify students’ reasoning, procedural choices, and interpretation of results. Analysis employed a rubric-guided coding scheme comprising three observable indicators of mathematical communication: (1) mathematical expression/modeling (translating contextual information into variables and SPLTV equations), (2) identifying relevant information and coherently explaining solution procedures, and (3) drawing contextual conclusions that interpret solutions in relation to the problem situation. To ensure consistent reporting, each indicator was evaluated by evidence source written work (W), interview evidence (I), or both (W+I) allowing the study to distinguish between students who understood an element but did not document it in writing. Findings indicate that all participants were able to construct an SPLTV model from the cultural context, and most were able to explain elimination–substitution procedures, although several omitted key communication components (e.g., “given/asked” statements or an explicit concluding sentence) in their written work. Overall, eight of ten students produced a valid contextual conclusion when evidence from written work and/or interviews was considered, whereas two students struggled with core procedural steps and therefore could not reach a meaningful conclusion. These results suggest that Papuan cultural contexts can support meaning-making and initial modeling, but explicit support for procedural fluency and written communication norms remains necessary to produce complete, accountable solutions.
Penerepan Model Pembelajaran Kooperatif Tipe Student Teams Achievement Division (STAD) pada Materi Kekongruenan Bangun Datar Halimatussa’diah; Raoda Ismail; Pitriana Tandililing; Dewi Kristika Findia Ning Tyas; Elsi Sirampun
Journal of Research in Science and Mathematics Education Vol. 5 No. 2 (2026): Current Issue - In Progress
Publisher : EDUPEDIA PUBLISHER

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56855/jrsme.v5i2.2189

Abstract

Purpose: This study aimed to describe the implementation of the Student Teams Achievement Division (STAD) cooperative learning model, students’ responses and engagement during the learning process, and students’ conceptual understanding of plane figure congruence. Methodology: This study employed a descriptive method with a qualitative approach and was conducted in Grade 7 of Muhammadiyah Junior High School Jayapura during the 2025/2026 academic year, involving 30 students as research participants. Data were collected through observations, interviews, tests, and documentation. Data validity was ensured through source triangulation and technique triangulation, while data analysis was carried out using the Miles and Huberman interactive model, which consists of data reduction, data display, and conclusion drawing. Findings: The findings revealed that the STAD cooperative learning model was implemented in accordance with the planned instructional stages: class presentation, team study, quizzes, individual improvement scores, and team recognition. During the learning process, students demonstrated positive responses through active participation in group discussions, confidence in expressing their opinions, and collaboration in completing assigned tasks. Significance: Interactions among students within heterogeneous groups provided opportunities for peer support in understanding the concept of plane figure congruence. Students’ conceptual understanding was reflected in their ability to identify corresponding elements of congruent figures, explain concepts in their own words, and solve problems related to the material being studied. Overall, the findings indicate that STAD supports active student engagement and the development of conceptual understanding of plane figure congruence.
Co-Authors Elsi Sirampun Halimatussa’diah Ismail, Raoda Marthinus Y. Ruamba Pitriana Tandililing Pujilestari Pujilestari Ririn Dwi Agustin