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All Journal PYTHAGORAS: Jurnal Program Studi Pendidikan Matematika Jurnal Pendidikan Matematika Raflesia Indiktika : Jurnal Inovasi Pendidikan Matematika Jurnal Pendidikan Matematika (JUDIKA EDUCATION) JE (Journal of Empowerment) JATI EMAS (Jurnal Aplikasi Teknik dan Pengabdian Masyarakat) Community Development Journal: Jurnal Pengabdian Masyarakat Range : Jurnal Pendidikan Matematika Jurnal PEKA (Pendidikan Matematika) Jurnal Math-UMB.EDU International Journal of STEM Education for Sustainability Journal Of Human And Education (JAHE) JIMAKUKERTA Journal of Mathematics Instruction, Social Research and Opinion Jurnal Edumatic : Jurnal Pendidikan Matematika Setawar Abdimas Abdi Reksa Differential: Journal on Mathematics Education
Ristontowi, Ristontowi
Universitas Muhammadiyah Bengkulu
Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Computer Science & IT Economics, Econometrics & Finance Education Engineering Health Professions Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Mathematics Public Health Social Sciences Other

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EKSPLORASI ETNOMATEMATIKA PADA CAGAR BUDAYA MAKAM SENTOT ALIBASYAH DI BENGKULU SEBAGAI BAHAN PEMBELAJARAN GEOMETRI Kinanti, Anggi Destri; Ristontowi, Ristontowi; Masri, Masri
Differential: Journal on Mathematics Education Vol. 3 No. 2 (2025): Differential: Journal on Mathematics Education
Publisher : Universitas Muhammadiyah Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32502/differential.v3i2.1099

Abstract

Matematika merupakan ilmu pengetahuan yang telah dikenalkan sejak dini oleh lingkungan sosial dan erat hubungannya dengan kehidupan sehari-hari, termasuk budaya. Etnomatematika hadir sebagai jembatan antara matematika dan budaya. Salah satu cagar budaya di Kota Bengkulu adalah Makam Sentot Alibasyah yang berlokasi di Kelurahan Bajak, Kecamatan Teluk Segara, Kota Bengkulu. Penelitian ini bertujuan untuk mengeksplorasi unsur-unsur matematika pada bangunan Makam Sentot Alibasyah yang dapat dijadikan bahan ajar dalam pembelajaran geometri. Penelitian menggunakan pendekatan deskriptif kualitatif dengan teknik pengumpulan data melalui observasi, wawancara, dan dokumentasi. Subjek penelitian meliputi ketua adat, tokoh masyarakat, dan warga sekitar makam. Hasil penelitian menunjukkan bahwa pada bangunan makam konsep geometri dasar, di antaranya bentuk kubus, balok vertikal, balok horizontal, prisma segitiga, limas segiempat, dan tabung. Temuan ini menunjukkan bahwa cagar budaya dapat menjadi sumber belajar yang kontekstual untuk mendukung pemahaman konsep geometri sekaligus memperkenalkan dan melestarikan budaya lokal.
MATHEMATICAL PROBLEM-SOLVING SKILLS AND STUDENTS' LEARNING INDEPENDENCE THROUGH PMRI BASED ON ENGINEERING DESIGN THINKING: Bengkulu, Indonesia Leni Pitriyani; Risnanosanti; Ristontowi; Rahmat Jumri; Adi Asmara
Jurnal Math-UMB.EDU Vol. 13 No. 2 (2026): MARCH
Publisher : Universitas Muhammadiyah Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36085/math-umb.edu.v13i2.10135

Abstract

This study aims to observe the differences in students' mathematical problem-solving abilities and learning independence in learning with the Indonesian Realistic Mathematics Education (PMRI) approach based on Engineering Design Thinking (EDT), the Indonesian Realistic Mathematics Education (PMRI) approach, and conventional learning. This study is a quasi-experimental study with a pretest–posttest control group design. The study population was all seventh-grade students of SMP Negeri 7 Bengkulu City in the 2025/2026 academic year. Data analysis was carried out using one-way ANOVA. The results showed that there were significant differences in students' mathematical problem-solving abilities taught with the PMRI approach based on EDT, PMRI, and conventional learning (F = 3.629; p = 0.031 < 0.05). The average posttest of students' mathematical problem-solving abilities in the PMRI class based on Engineering Design Thinking was 28.75, the PMRI class was 26.84, and the conventional learning class was 24.42. In addition, there was a significant difference in student learning independence between the three learning groups (F = 3.734; p = 0.029 < 0.05). The average student learning independence in the EDT-based PMRI class was 73.94, higher than the PMRI class (68.95) and the conventional learning class (68.13). Based on these results, EDT-based PMRI learning is more effective in improving students' mathematical problem-solving abilities and learning independence. Keywords: PMRI, Engineering Design Thinking (EDT), Mathematical Problem Solving Ability, Learning Independence.
Development of LKPD in the Context of Tabut Culture with a STEAM Approach to Facilitate Numeracy Literacy Muthia Maghfira; Ristontowi Ristontowi; Winda Ramadianti
Journal of Mathematics Instruction, Social Research and Opinion Vol. 5 No. 1 (2026): March
Publisher : MASI Mandiri Edukasi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58421/misro.v5i1.1061

Abstract

Numeracy literacy skills are basic competencies that need to be developed in junior high school (SMP) students in the 21st century. However, mathematics learning in schools has not yet linked the concept of mathematics to the cultural context in daily life. This research aims to develop Student Worksheets (LKPD) in the Context of Tabut Culture with a valid and practical STEAM approach to facilitate students' numeracy literacy. This research uses the Research and Development (R&D) method with a 4D development model comprising define, design, and develop stages, while the disseminate stage is not carried out. The research subjects included 31 students and 1 mathematics teacher in grade VII of SMPN 1 Kepahiang. The research instrument consists of validation sheets and questionnaires on the practicality of students and teachers. The study's results showed that the LKPD developed had a validity rate of 87.83% in the very valid category. The results of the practicality test showed that 80.67% of students were in the practical category, and 82.27% of teachers were in the very practical category. These findings show that LKPD, in the context of Ark Culture with a STEAM approach, is suitable as innovative teaching materials to support contextual mathematics learning and improve students' numeracy literacy.
Description of Students' Mathematical Critical Thinking Ability on Circle Material in Class VIII of SMP Negeri 09 Lebong Ristontowi Ristontowi; Sakut Adepio; Winda Ramadianti; Masri Masri; Rahmat Jumri
Journal of Mathematics Instruction, Social Research and Opinion Vol. 4 No. 4 (2025): December
Publisher : MASI Mandiri Edukasi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58421/misro.v4i4.1165

Abstract

Mathematical critical thinking ability is the capacity to investigate, discover, connect, and assess every aspect of a problem carefully and thoughtfully to arrive at the best solution. This study aims to describe students' mathematical critical thinking abilities regarding circles in Grade VIII at SMP Negeri 09 Lebong. This research is a qualitative descriptive study with 20 student participants. Three students were interviewed: one with high ability, one with medium ability, and one with low ability. Data collection methods included tests, interviews, and documentation. The research instruments consisted of test items and interview guidelines. The data analysis technique involved data collection, data reduction, data presentation, and conclusion. The results of the study show that high-ability students met all indicators of mathematical critical thinking: Interpretation, Analysis, Evaluation, and Conclusion. Medium-ability students met two indicators: Interpretation and Analysis. Low-ability students were unable to meet the indicators of mathematical critical thinking: Interpretation, Analysis, Evaluation, and Conclusion.
Pengembangan LKPD Geometri Berbasis Etnomatematika Tari Kejei Lambayu, Putri Ewis; Masri, Masri; Asmara, Adi; Jumri, Rahmat; Ristontowi, Ristontowi
Jurnal Pendidikan Matematika : Judika Education Vol. 9 No. 4 (2026): Jurnal Pendidikan Matematika:Judika Education
Publisher : Institut Penelitian Matematika, Komputer, Keperawatan, Pendidikan dan Ekonomi (IPM2KPE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31539/mwhfxw87

Abstract

This study aims to Develop geometry teaching materials based on the ethnomathematics of the Kejei Dance that are valid and practical for use in mathematics learning. This research employs the Research and Development (R&D) method with a 4D Development model consisting of the define, Design, Develop, and disseminate stages. However, this study is limited to the Develop stage. The subjects of this study were 22 seventh-grade students of SMPN 09 Lebong. The data collection instruments used were expert validation sheets to measure the validity of the teaching materials and questionnaires for teachers’ and students’ responses to determine the practicality of the product. The results show that the geometry teaching materials based on the ethnomathematics of the Kejei Dance obtained an average validity score of 87.3%, categorized as very valid based on expert assessments of material and media. In addition, the practicality test results based on teachers’ and students’ responses showed an average percentage of 91.7%, categorized as very practical. These results indicate that the Developed teaching materials are feasible for use in mathematics learning.   Kata Kunci: Teaching Materials, Ethnomathematics, Geometry, Kejei Dance, Student Worksheets.
Pengembangan LKPD Konsep Perbandingan Etnomatematika pada Makanan Khas Bengkulu, Lemang Mutiara, Dea; Ristontowi, Ristontowi; Etmy, Desventri
Jurnal Pendidikan Matematika : Judika Education Vol. 9 No. 4 (2026): Jurnal Pendidikan Matematika:Judika Education
Publisher : Institut Penelitian Matematika, Komputer, Keperawatan, Pendidikan dan Ekonomi (IPM2KPE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31539/z3s20j38

Abstract

This study aims to develop a Student Worksheet (LKPD) on the concept of ethnomathematic comparison of Bengkulu's traditional food, namely lemang. This study uses the Research and Development (R&D) method with a 4D development model that includes the Define, Design, and Develop stages. The research subjects consisted of 28 seventh-grade students at SMP Negeri 10 Bengkulu City. The instruments used were expert validation sheets and teacher and student response questionnaires to measure the level of validity and practicality of the product. The results showed that the developed LKPD obtained a validity level of 92.7% with a very valid category. In addition, the results of the practicality test showed an average value of 85.3% with a very practical category. This indicates that the LKPD based on ethnomathematics in the context of lemang is suitable for use in mathematics learning, especially on comparison material. Conclusion, The use of local cultural contexts has also been proven to be able to increase students' interest and understanding of mathematical concepts in a more contextual and meaningful way.   Keywords: LKPD; ethnomathematics; comparison; lemang; development.  
Co-Authors Adi Asmara Adriadi, Rekho Agus Sigit, Ego Anjelia, Delia Dwi Asmara, Adi Ayu Ziana Bahasa Indonesia Bahasa Indonesia, Bahasa Indonesia Bella Nandita Destania, Yuriska desventri etmy, desventri Dewi Kurnia Dwi Ningsih, Febriyanti Elin Novita Sari Farras, Haniyah Raihani Fefti Puji Lestari Firmania, Deya Jayusta, Evan Juhardi, Ujang Kashardi, Kashardi Kinanti, Anggi Destri Lambayu, Putri Ewis Lely Syahfitri Leni Pitriyani Lili, Lili Rahmawati Mardiah Syofiana Masri Masri Masri Masri Masri Masyita Ariani, Nyayu Masyita, Nyayu Meisi Eka Sari Mimmi Sossriati Muthia Maghfira Mutiara, Dea Neti Kesumawati, Neti Ningsih, Ragilvi Piusta Novita Sari Nyayu Masyita Ariani PUTRI WAHYUNI Rahmat Jumri Risnanosanti Risnanosanti Risnanosanti Riwayati, Selvi Rossa Ayuni Safitri, Vickha Ayu Sakut Adepio Sastra Selvi Riwayati Selvi Riwayati septia agustina Suri, Atika Syahfitri, Lely Syofiana, Mardiah Syorga, Dwi Aroma Tri Gusti Putra Vevi Sumantri Vioneka, Ranti Winda Ramadianti Winda Ramadianti Winda Ramadianti, Winda Yoga Widianto, Indra Yudha, Romadhona Kusuma YUNI ASTUTI Yuza Reswan