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All Journal Jurnal Ilmu Pendidikan Indonesia Journal of Honai Math Jurnal Ilmiah Mandala Education (JIME) JISIP: Jurnal Ilmu Sosial dan Pendidikan JUPE : Jurnal Pendidikan Mandala Jurnal Sora: Pernik Bahasa Asing Sang Pencerah: Jurnal Ilmiah Universitas Muhammadiyah Buton Abdi Masyarakat ScienceEdu : Jurnal Pendidikan IPA Jurnal Altifani Penelitian dan Pengabdian kepada Masyarakat Journal of Education Research Jurnal Ilmu Pendidikan Indonesia Edumatica: Jurnal Pendidikan Matematika Jurnal Informatika dan Teknologi Pendidikan Jurnal Pengabdian Masyarakat Bangsa Science and Technology: Jurnal Pengabdian Masyarakat Hipotenusa: Journal of Mathematical Society
Ronaldo Kho
Program Studi Pendidikan Matematika, FKIP, Universitas Cenderawasih
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Energy Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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Edukasi Alat Peraga Pola Bilangan Untuk Siswa SMP Negeri 1 Demta, Papua Panjaitan, Agnes Teresa; Ronaldo Kho; Mayor M H Manurung; Putri Violenta Siringo-ringo; Dela Rismawati; Frizka Maryam Saqina; Rahmah Puspita Mardiani; Yunita Cristianti Noriwari
Science and Technology: Jurnal Pengabdian Masyarakat Vol. 2 No. 2 (2025): Juni
Publisher : CV. Science Tech Group

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69930/scitec.v2i2.440

Abstract

Kegiatan pengabdian kepada masyarakat ini bertujuan untuk meningkatkan pemahaman siswa kelas VIII A SMP Negeri 1 Demta terhadap materi pola bilangan melalui penggunaan alat peraga edukatif. Masalah yang dihadapi siswa adalah rendahnya pemahaman konsep dan keterbatasan media pembelajaran kontekstual. Metode yang digunakan adalah pelatihan, pendampingan, dan praktik langsung dengan alat peraga yang dirancang khusus. Hasil kegiatan menunjukkan peningkatan antusiasme dan pemahaman siswa terhadap pola bilangan. Kegiatan ini memberikan kontribusi positif terhadap proses pembelajaran matematika di kelas, serta menjadi model edukatif yang dapat direplikasi di sekolah lain.
Ethnomathematical Exploration in Traditional Houses or Asmat Tribe as a Source of Mathematics Learning s, Lisnawati; Kho, Ronaldo; Tandililing, Pitriana; Sirampun, Elsi; Ruamba, Marthinus Yohanes
JUPE : Jurnal Pendidikan Mandala Vol 10, No 2 (2025): JUPE : Jurnal Pendidikan Mandala (Juni)
Publisher : Lembaga Penelitian dan Pendidikan Mandala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58258/jupe.v10i2.8977

Abstract

This research is a qualitative study with an ethnographic approach. The purpose of this research is to analyze and describe the ethnomathematics activities, the mathematical elements found in the traditional Jew house of the Asmat tribe, and the mathematical elements in the Jew house that can be used as a source for mathematics learning. Data collection in this research was conducted through observation, interviews, and documentation. The instruments in this study are the research itself as the main instrument, along with supporting instruments in the form of interview guidelines and observation guidelines. Interviews were conducted with two informants, namely the Jew elders and the Asmat community, who are believed to have knowledge and understanding of how to build traditional houses and their components, as well as the meanings contained within these traditional houses. The research results show that there are ethnomathematics activities in the Jew traditional house, namely counting, locating, measuring, designing, and explaining. The mathematical elements found in the Jew traditional house are rectangles, triangles, cuboids and cubes, cylinders, arithmetic operations, area and volume, and distance. The results of this research can be used to develop mathematics learning tools.
Difference Results Study Mathematics And Activity Study Using Learning Models Cooperative Type Teams Games Tournament (TGT) and Numbered Heads Together (NHT) on Material Operation Count Algebra Ashari, Mila Dwi Nanda; Lumbantobing, Happy; Hadiyanti, Yosefin Rianta; Kho, Ronaldo; Sitepu, Rina Ananta
JUPE : Jurnal Pendidikan Mandala Vol 10, No 2 (2025): JUPE : Jurnal Pendidikan Mandala (Juni)
Publisher : Lembaga Penelitian dan Pendidikan Mandala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58258/jupe.v10i2.8807

Abstract

This study aims to investigate the disparities in mathematics learning outcomes of students instructed through the Teams Games Tournament (TGT) and Numbered Heads Together (NHT) cooperative learning methods concerning algebraic arithmetic operations. The study was conducted at SMP Muhammadiyah Jayapura. This research employs an experimental design using counterbalancing. The study population comprised class VII of SMP Muhammadiyah Jayapura during the 2024/2025 academic year, with the research sample consisting of classes VII-B and VII-C, each containing 34 pupils. The sample selection employed a purposive sampling method. Data on learning outcomes were obtained through a validated assessment instrument. We analyzed the pretest and posttest scores to derive normalized learning outcome values (N-gain). Due to the non-normal distribution of the data, we evaluated the N-gain value using non-parametric statistics via the Wilcoxon test. The study's results showed a significant difference in learning outcomes between the Teams Games Tournament (TGT) and Numbered Heads Together (NHT) cooperative learning models, with a sig. ρ value of 0.401, which is higher than 0.05. The mean N-gain value in Teams Games Tournament (TGT) (0.93) surpassed the mean N-gain value of Numbered Heads Together (NHT) (0.92). The study's results indicated that student engagement in learning through the Numbered Heads Together (NHT) method surpassed that of the Teams Games Tournament (TGT) model. The disparity in activity was substantial according to the Wilcoxon test, with a significance level of sig. ρ = 0.705.
Geometric Thinking Levels in Learning Quadrilaterals: A Van Hiele-Based Case Study in a Papuan Junior High School Tandililing, Pitriana; Sirampun, Elsi; Kho, Ronaldo; Ruamba, Marthinus Yohanes
Edumatica : Jurnal Pendidikan Matematika Vol 15 No 2 (2025): Edumatica: Jurnal Pendidikan matematika (Agustus 2025)
Publisher : Department of Mathematics Education, Faculty of Teacher Training and Education, Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/edumatica.v15i2.43719

Abstract

This study investigated the geometric thinking levels of eighth-grade students in a Papuan junior high school, using the van Hiele theoretical framework, with a focus on their understanding of quadrilaterals. The research addressed common misconceptions and limited conceptual understanding among students by exploring how they classified, identified, and described the properties of quadrilaterals. A qualitative descriptive design was employed, involving 25 students selected through purposive sampling. Data were collected using structured interviews, drawing tasks, and classification activities. The primary instrument included three tasks: drawing various quadrilaterals, identifying and defining their properties, and classifying them based on shared attributes. The results showed that 50% of students operated at van Hiele Level 0 (Visualization), 36% were transitioning between Level 0 and Level 1 (Analysis), and only 14% reached Level 1. Students frequently relied on visual appearance rather than formal geometric attributes, leading to persistent misconceptions about hierarchical relationships among shapes. No students demonstrated reasoning beyond Level 1. The findings emphasized the need for instructional approaches that integrate cultural context, use dynamic visual tools, and scaffold learning to support higher-order geometric reasoning. Further research is recommended to develop culturally responsive models and extend the study across different educational contexts.
Ethnomathematical Exploration of Numeration Systems: The Mee Tribal Indigenous Community Ruamba, Marthinus Yohanes; Kho, Ronaldo; Lumbantobing, Happy; Edoway, Naftali
ScienceEdu Vol. 8 No. 1 (2025)
Publisher : Program Studi Pendidikan IPA FKIP Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/se.v8i1.53688

Abstract

This study aims at documenting and analyzing the traditional number system of the Mee tribe in Papua within an ethnomathematics framework. Papua is a cultural well with the numeral system reflecting the values of the culture and the social structure of the society. Such integration of culturally based mathematical concepts with the help of the ethnometematic approach might be theoretically expected to enhance mathematical learning, relevant from a cultural point of view. Qualitative research with participatory observation, in-depth interviews, and artifact analysis was carried out in Sentani-Sereh. From the research, it can be said that the uniqueness of the combination between single and decimal numbers can indicate the structure of the Mee Tribe culture. This system shows a possibility for implementation in culture-based learning. This documentation leans more towards cultural preservation efforts, enriching the literature of ethno-mathematics and recognizing traditional knowledge, which is part of cultural heritage and needs to be preserved in the wave of modernization
Ethnomathematics Exploration of Carvings in Asei Community Houses as a Source of School Mathematics Learning Waralangi, Aprilia Dian; Kho, Ronaldo; Tandililing, Pitriana; Sirampun, Elsi; Ruamba, Marthinus Y
JUPE : Jurnal Pendidikan Mandala Vol 10, No 2 (2025): JUPE : Jurnal Pendidikan Mandala (Juni)
Publisher : Lembaga Penelitian dan Pendidikan Mandala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58258/jupe.v10i2.8972

Abstract

The Asei people are known for their distinctive local cultural heritage, particularly in the form of carvings that decorate their house walls. These carvings serve not only as symbols of cultural and social identity but also contain visual structures rich in mathematical concepts. This study aims to explore and describe the mathematical elements found in the carvings of houses in the Asei community, located in East Sentani District, Jayapura Regency, Papua, as well as to examine their potential as a source for school mathematics learning. This research employs a qualitative approach using ethnographic methods. Data were collected through direct observation, in-depth interviews with two informants knowledgeable about the meanings of the carvings, and visual documentation. The collected data were analyzed through a continuous interactive process of data reduction, data presentation, and conclusion drawing. The results reveal that the carvings on Asei houses encompass various mathematical elements, including reflection, symmetry, rotation, dilation, as well as geometric shapes such as circles, triangles, parallelograms, trapezoids, parallel lines, obtuse angles, and acute angles. These elements are found within seven main carving motifs, namely kino, heuw, iuwga, me khela-khela, fouw, khaley, and kheika.
Eksplorasi Etnomatematika Pada Rumah Adat Masyarakat Skouw Sae Saranga, Nelfan; Kho, Ronaldo; Hadiyanti, Yosefin Rianita
Jurnal Ilmiah Mandala Education (JIME) Vol 9, No 2 (2023): Jurnal Ilmiah Mandala Education (April)
Publisher : Lembaga Penelitian dan Pendidikan Mandala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58258/jime.v9i2.4727

Abstract

Penelitian ini merupakan penelitian etnografi. Tujuan dari penelitian ini adalah untuk melakukan eksplorasi dan pengkajian mengenai aktivitas etnomatematika, serta unsur-unsur matematika yang terdapat pada rumah adat masyarakat Skouw Sae. Pengumpulan data dalam penelitian ini dilakukan dengan observasi, wawancara dan dokumentasi. Instrumen dalam penelitian ini adalah peneliti sendiri sebagai instrumen utama dan terdapat instrumen pendukung berupa pedoman wawancara dan pedoman observasi. Wawancara dilakukan terhadap tiga orang informan yaitu dua orang kepala suku dari Skouw sae dan seorang tukang atau pembuat rumah adat yang diyakini memiliki pengetahuan dan memahami cara membuat rumah adat dan bagian-bagiannya serta makna-makna yang terkandung dalam rumah adat. Hasil penelitian menunjukkan bahwa terdapat aktivitas etnomatematika pada rumah adat skouw Sae yaitu counting, locating, measuring, designing, dan explaining. Unsur-unsur matematika yang terdapat dalam rumah adat Skouw sae yaitu persegi dan persegi panjang, segitiga, trapesium, balok, tabung, prisma, operasi hitung bilangan, luas dan volume, serta letak dan jarak objek. Hasil penelitian ini dapat digunakan untuk mengembangkan perangkat pembelajaran matematika.
Implementation of Project-Based Learning to Enhance Activeness and Statistics Learning Rafianti Bau, Siti; Napitupulu, Bettisari; Kho, Ronaldo
Sang Pencerah: Jurnal Ilmiah Universitas Muhammadiyah Buton Vol. 11 No. 4 (2025): Sang Pencerah: Jurnal Ilmiah Universitas Muhammadiyah Buton (Special Issue)
Publisher : Lembaga Jurnal dan Publikasi Universitas Muhammadiyah Buton

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study examines the effectiveness of the Project-Based Learning model in improving students’ activeness and learning outcomes in the Statistics subject at SMK Negeri 3 Kesehatan dan Pekerjaan Sosial Mimika. The research was conducted to determine how far this learning model can foster active participation and enhance students’ understanding through meaningful learning experiences. The main objective is to create a dynamic learning atmosphere where students are directly involved in exploring, designing, and presenting projects related to statistical concepts. The study applied a quantitative approach using a Classroom Action Research design consisting of planning, action, observation, and reflection stages. Data collection utilized observation sheets, project rubrics, and achievement tests. The findings indicated that students became more engaged during the learning process, showing greater initiative and collaboration in completing project tasks. Learning outcomes also demonstrated noticeable improvement, with students achieving higher levels of comprehension and problem-solving ability. Moreover, the project results reflected students’ creativity and ability to apply statistical concepts in practical contexts. Overall, the implementation of the Project-Based Learning model succeeded in promoting an active, participatory, and student-centered classroom environment, supporting both cognitive and affective learning growth among students.
Analysis of Eighth-Grade Students’ Critical and Creative Thinking Skills In Solving Open-Ended Mathematics Problems Rifiyani; Kho, Ronaldo; Hutabarat, Ida Maryati
Sang Pencerah: Jurnal Ilmiah Universitas Muhammadiyah Buton Vol. 11 No. 4 (2025): Sang Pencerah: Jurnal Ilmiah Universitas Muhammadiyah Buton (Special Issue)
Publisher : Lembaga Jurnal dan Publikasi Universitas Muhammadiyah Buton

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Mathematics plays a crucial role in fostering students’ logical and higher-order thinking skills, yet many Indonesian students still struggle with problem-solving, particularly in applying mathematical concepts to financial literacy contexts. This study aims to analyze the critical and creative thinking abilities of eighth-grade students at SMP Al-Ihsan Kotaraja in solving open-ended mathematical problems. A descriptive qualitative approach was employed, with participants categorized into high, moderate, and low academic achievement levels. Data were collected through open-ended problem-solving tests, interviews, and classroom observations, and analyzed using rubrics for critical and creative thinking. The findings reveal that high-achieving students reached maximum scores across indicators of critical and creative thinking, demonstrating strong reasoning, reflection, and originality in solutions. Conversely, students with moderate and low achievement levels experienced difficulties in constructing valid inferences, generating diverse strategies, and elaborating on problem-solving processes. These results highlight the effectiveness of open-ended problems as diagnostic and instructional tools for developing higher-order thinking skills. The study underscores the importance of differentiated instruction to address students’ varying abilities and suggests that the integration of the Problem-Based Learning model can enhance mathematical problem-solving skills while strengthening financial literacy.
Pelatihan Pembuatan Alat Peraga Matematika bagi Guru-guru SD YPK Yoka Baru Waena Kota Jayapura Kho, Ronaldo; Tyas, Dewi Kristika N.
JISIP: Jurnal Ilmu Sosial dan Pendidikan Vol 4, No 2 (2020): JISIP (Jurnal Ilmu Sosial dan Pendidikan)
Publisher : Lembaga Penelitian dan Pendidikan (LPP) Mandala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (211.628 KB) | DOI: 10.58258/jisip.v4i2.1072

Abstract

Untuk mengajar matematika khususnya konsep pecahan kepada siswa sekolah dasar, guru dituntut harus menyiapkan strategi yang jitu agar siswa dengan mudah memahami materi yang diajarkan. Salah satu strategi yang dapat digunakan oleh guru adalah menerapkan pembelajaran Joyful learning dengan memanfaatkan media pembelajaran berupa alat peraga. Kegiatan pengabdian ini dilaksanakan dengan tujuan untuk meningkatkan kemampuan guru-guru SD YPK Yoka Baru Waena Kota Jayapura dalam merancang, membuat, dan menggunakan alat peraga dalam pembelajaran matematika khususnya alat peraga roda pecahan. Hasil pengabdian menunjukkan bahwa (1) Pelaksanaan kegiatan berjalan dengan lancar, (2) Tidak semua peserta mampu memahami pembuatan alat peraga roda pecahan, dan (3) Guru/peserta dapat memahami terhadap cara penggunaan alat peraga roda pecahan dalam pembelajaran pecahan melalui kelas simulasi.
Co-Authors Ardiasih, Lidwina Sri Ashari, Mila Dwi Nanda Bettisari Napitupulu Bettisari Napitupulu Dela Rismawati Dewi Kristika Findia Ning Tyas Dewi Kristika N. Tyas Doo, Katarina Edoway, Naftali Elisabeth Kafiar, Elisabeth Frizka Maryam Saqina Gatot Sugondo, Gatot Hadiyanti, Yosefin Rianta Happy Lumbantobing Happy Lumbantobing, Happy Hutabarat, Ida Maryati Ida Mariati Hutabarat Irfan Wahyudi Irfan Wahyudi Jonner Nainggolan Lulus Puji Astuti, Lulus Puji Marsintauli Marpaung, Marsintauli MARTHINUS KAYAME Marthinus Kayame, Marthinus Matius Pai’pinan, Matius Matius Pai’pinan Mayor M H Manurung Mayor M.H. Manurung Mochamad Arbianto, Mochamad MULIARTO RUBEN GIRIK ALLO Muliarto Ruben Girik Allo, Muliarto Ruben Girik Naftali Tahir, Naftali Naiborhu, Rusdin Nuraini, Dini Rahmatun Panjaitan, Agnes Teresa Pitriana Tandililing Putri Violenta Siringo-ringo Quamilla, Vini Rafianti Bau, Siti Rahmah Puspita Mardiani Ratna Juliati Ketaren, Ratna Juliati Rifiyani Ruamba, Marthinus Y Ruamba, Marthinus Yohanes s, Lisnawati Salmiati Salmiati, Salmiati Saranga, Nelfan Sinambela, Mei Helden Sirampun, Elsi Sitepu, Rina Ananta Solihati, Titi Triwiyono - Tyas, Dewi Kristika N. Waralangi, Aprilia Dian Yektiningtyas, Wigaty Yeni D. Fonataba Yosefin Rianita Hadiyanti Yunita Cristianti Noriwari