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All Journal Abdimas Talenta : Jurnal Pengabdian Kepada Masyarakat JMM (Jurnal Masyarakat Mandiri) SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan JURNAL MathEdu (Mathematic Education Journal) Vygotsky: Jurnal Pendidikan Matematika dan Matematika Jurnal Eduscience (JES) JURNAL PEMBELAJARAN DAN MATEMATIKA SIGMA (JPMS) J-PiMat : Jurnal Pendidikan Matematika Jurnal Abdi Insani Dimensi Matematika : Jurnal Pendidikan dan Pembelajaran Matematika Jurnal Penelitian Inovatif MATH-EDU: Jurnal Ilmu Pendidikan Matematika Jurnal Pengabdian Sains dan Humaniora Indonesian Educational Research Journal Trigonometri : Jurnal Matematika Media Pendidikan Matematika
Yohanes Jefrianus Kehi
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Agriculture, Biological Sciences & Forestry Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Medicine & Pharmacology Nursing Public Health Social Sciences Other

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Development of Student Worksheets Using The Missouri Mathematics Model with Peer Feedback on Linear Programming Material Naimnule, Maria; Kehi, Yohanes Jefrianus; Handayani, Rika
Vygotsky: Jurnal Pendidikan Matematika dan Matematika Vol. 7 No. 2 (2025): Vygotsky: Jurnal Pendidikan Matematika dan Matematika
Publisher : Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/voj.v7i2.1217

Abstract

This study aimed to develop a valid, practical, and effective student worksheet (LKS) for linear programming material based on the Missouri Mathematics Project (MMP) model with peer feedback. Using a Research and Development (R&D) design comprising definition, design, development, and dissemination stages, data were collected through validation sheets, questionnaires, and tests. The developed worksheet was assessed as valid by experts 80%, practical based on student and teacher responses 85%, and effective in improving learning outcomes. Effectiveness was indicated by 79% classical completeness and a significant improvement in Post test scores compared to Pre test results (p < 0.05 ). The findings show that the MMP-based worksheet with peer feedback meets the criteria for valid, practical, and effective learning tools.
Pengabdian kepada masyarakat melalui pengembangan modul interaktif untuk peningkatan kualitas pembelajaran statistika di SMP Satu Atap Negeri Maumolo Mone, Ferdinandus; Simarmata, Justin Eduardo; Kehi, Yohanes Jefrianus; Laja, Yosepha Patricia Wua; Purnomo, Miko; Chrisinta, Debora; Abi, Roberto; Tavares, Ricson
SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Vol 9, No 6 (2025): November
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jpmb.v9i6.34518

Abstract

Abstrak Pembelajaran Statistika di tingkat SMP sering dianggap sulit oleh siswa karena penyajiannya yang cenderung abstrak dan kurang kontekstual. Kondisi ini juga dialami oleh siswa SMP Satu Atap Negeri Maumolo, khususnya di kelas VIII, yang menunjukkan rendahnya pemahaman konsep dasar Statistika. Oleh karena itu, kegiatan pengabdian kepada masyarakat ini bertujuan untuk mengembangkan dan menerapkan modul interaktif sebagai media pembelajaran yang dapat meningkatkan pemahaman siswa. Mitra kegiatan adalah SMP Satu Atap Negeri Maumolo dengan sasaran 30 siswa kelas VIII yang mengikuti kegiatan selama dua hari, pada tanggal 1 dan 2 Agustus 2025. Metode pelaksanaan meliputi penyusunan modul interaktif, penyampaian materi berbasis kontekstual, diskusi, serta pendampingan dalam mengerjakan latihan soal. Hasil kegiatan menunjukkan peningkatan pemahaman siswa yang terlihat dari peningkatan rata-rata nilai latihan dari 58 pada awal kegiatan menjadi 80 setelah penggunaan modul. Secara kualitatif, siswa menyatakan modul mudah dipahami, tampilannya menarik, serta membantu meningkatkan kepercayaan diri dalam mempelajari Statistika. Lebih dari 85% siswa terlibat aktif dalam diskusi dan mampu menyelesaikan soal dengan baik. Dengan demikian, kegiatan ini memberikan dampak positif dalam mendukung peningkatan kualitas pembelajaran Statistika dan dapat dijadikan model alternatif pembelajaran bagi sekolah-sekolah di wilayah perbatasan. Kata kunci: Pengabdian masyarakat; modul interaktif; statistika; pemahaman siswa; SMP. Abstract Statistics learning at the junior high school level is often perceived as difficult by students due to its abstract presentation and lack of contextual approaches. This condition is also found among eighth-grade students of SMP Satu Atap Negeri Maumolo, who demonstrate limited understanding of basic statistical concepts. Therefore, this community service activity aimed to develop and implement an interactive module as a learning medium to improve students’ comprehension. The partner institution was SMP Satu Atap Negeri Maumolo, involving 30 eighth-grade students who participated in the program over two days, on August 1–2, 2025. The implementation methods included the development of the interactive module, contextual delivery of materials, group discussions, and guided practice in solving problems provided in the module. The results indicated an improvement in students’ understanding, as reflected in the increase of average practice scores from 58 at the beginning of the activity to 80 after the module was applied. Qualitatively, students reported that the module was easy to understand, visually engaging, and helpful in building their confidence in learning Statistics. More than 85% of students actively engaged in discussions and successfully completed the exercises. In conclusion, this activity had a positive impact on improving the quality of Statistics learning and can serve as an alternative model for schools in border regions. Keywords: community service; interactive module; statistics; student comprehension; junior high school.
EKSPLORASI KONSEP GEOMETRI PADA RUMAH ADAT NUBABI DESA NIFUBOKE KECAMATAN NOEMUTI Yohanes Jefrianus Kehi
JURNAL PEMBELAJARAN DAN MATEMATIKA SIGMA (JPMS) Vol 11, No 1 (2025)
Publisher : Fakultas Keguruan dan Ilmu pendidikan (FKIP) Universitas Labuhan Batu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/jpms.v11i1.7130

Abstract

Budaya merupakan cara hidup yang berkembang disuatu masyarakat dan menjadi sebuah warisan dari generasi ke generasi secara turun temurun. Budaya terbentuk dari berbagai unsur yang rumit, termasuk sistem kepercayaan, norma, nilai, adat istiadat, dan bahasa. Budaya yang berkembang dimasyarakat juga seringkali memiliki kaitan dengan konsep konsep matematika yang ada dalam kehidupan sehari hari yang seringkali di sebut etnomatika.  Etnomatika adalah kajian yang menghubungkan matematika dengan aspek budaya lokal, termasuk simbol, struktur, dan tata ruang yang memiliki makna mendalam dalam kehidupan masyarakat. Konsep etnomatika ini tidak hanya berfungsi sebagai penanda identitas budaya, tetapi juga sebagai panduan kehidupan yang selaras dengan alam dan sosial komunitas. Penelitian ini bertujuan untuk menggali dan menganalisis konsep etnomatika atau kaitan budaya dengan matematika yang tercermin dalam rumah adat Nubabi yang ada di Desa Nifuboke, Kecamatan Noemuti.  Rumah adat Nubabi, sebagai warisan budaya, memiliki pola desain dan struktur yang tidak hanya berfungsi sebagai tempat tinggal, tetapi juga menyimpan nilai-nilai filosofis dan kearifan lokal yang berkaitan dengan kehidupan masyarakat setempat. Hasil penelitian ini menunjukkan bahwa rumah adat Nubabi mencerminkan penerapan prinsip prinsip etnomatika, seperti simetri, proporsi, dan pola geometris yang digunakan dalam konstruksi bangunan dan dekorasi, yang memiliki hubungan erat dengan nilai-nilai sosial dan budaya masyarakat Nifuboke. Metode penelitian yang digunakan adalah kualitatif dengan pendekatan etnografi, melalui observasi langsung dan wawancara dengan tokoh masyarakat dan ahli adat setempat. Penelitian ini diharapkan dapat memberikan kontribusi dalam memahami keterkaitan antara matematika dan budaya dalam konteks arsitektur tradisional Indonesia, serta pentingnya pelestarian pengetahuan lokal dalam era modern.
Evaluasi Hasil Belajar Matematika melalui Media Interaktif RStudio dengan Uji Wilcoxon Roberto Abi; Justin Eduardo Simarmata; Yohanes Jefrianus Kehi
J-PiMat : Jurnal Pendidikan Matematika Vol 8, No 1 (2026): J-PiMat
Publisher : Prodi Pendidikan Matematika STKIP Persada Khatu;istiwa Sintang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31932/j-pimat.v8i1.6172

Abstract

Mathematics learning is often considered difficult by students because the concept is abstract, especially the topic of systems of linear inequalities in two variables (SPtLDV). The limitations of visualization in conventional learning lead to low conceptual understanding and impact student learning outcomes. Learning media that can present interactive visual representations are needed to help students understand mathematical concepts concretely. This study aims to evaluate students' mathematics learning outcomes after using RStudio-based interactive learning media on the topic of SPtLDV. This study used a quantitative approach, involving 36 grade X students of SMA Negeri 1 Kefamenanu. Learning outcome data were obtained through pretest and posttest. Data analysis was carried out using descriptive statistics, boxplot visualization to illustrate data distribution, and the Wilcoxon signed-rank test at a significance level of 5% to test the difference in scores before and after learning. The results of the analysis showed that the average posttest score was higher than the pretest, accompanied by a shift in the distribution of scores towards a higher direction in the boxplot visualization. The Wilcoxon signed-rank test showed a significant difference between the pretest and posttest scores (p < 0.05). These findings indicate that the use of RStudio-based interactive learning media is associated with improved student learning outcomes the topic of SPtLDV. This research contributes to the development of statistical software as an interactive visualization medium to support mathematics learning at the secondary school level.Keyword: Interactive Learning Media, RStudio, Mathematics Learning Outcomes.
Development of Student Worksheets Using The Missouri Mathematics Model with Peer Feedback on Linear Programming Material Maria Naimnule; Yohanes Jefrianus Kehi; Rika Handayani
Vygotsky: Jurnal Pendidikan Matematika dan Matematika Vol. 7 No. 2 (2025): Vygotsky: Jurnal Pendidikan Matematika dan Matematika
Publisher : Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/voj.v7i2.1217

Abstract

This study aimed to develop a valid, practical, and effective student worksheet (LKS) for linear programming material based on the Missouri Mathematics Project (MMP) model with peer feedback. Using a Research and Development (R&D) design comprising definition, design, development, and dissemination stages, data were collected through validation sheets, questionnaires, and tests. The developed worksheet was assessed as valid by experts 80%, practical based on student and teacher responses 85%, and effective in improving learning outcomes. Effectiveness was indicated by 79% classical completeness and a significant improvement in Post test scores compared to Pre test results (p < 0.05 ). The findings show that the MMP-based worksheet with peer feedback meets the criteria for valid, practical, and effective learning tools.
Numeracy Skills of Junior High School Students: A Comparative Study Based on Learning Approach Interventions Ana Paula Tae; Aloisius Loka Son; Yohanes Jefrianus Kehi; Camilo Andrés Rodríguez-Nieto; Javier García-García
Indonesian Educational Research Journal Vol. 3 No. 1 (2025): Various Learning Strategies in Education to Facilitate Student Learning Outcome
Publisher : CV. Samuel Manurung and Co

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56773/ierj.v3i1.90

Abstract

This study aims to determine the achievement and improvement of students' numeracy skills based on the Realistic Mathematics Education (RME) approach intervention. This research used a quasi-experimental method with a pretest-posttest control group design. The research sample consisted of two classes, namely the experimental class that used the RME approach and the control class that used conventional methods. The instrument used was a numeracy description test question on the material of the Two-Variable Linear Equation System. The results showed that the achievement and improvement of students' numeracy skills, who learned through the realistic mathematics education approach, were better than students who learn through conventional approaches. This shows that learning with a realistic mathematics education approach can facilitate the numeracy skills of junior high school students. It is hoped that future researchers can apply the realistic mathematics education approach to other mathematical skills.
ETNOMATEMATIKA TENUN TRADISIONAL BUNA TIMOR TENGAH UTARA DAN IMPLIKASI PEDAGOGIS Selestina Nahak; Ivonia Ulu; Yohanes Jefrianus Kehi
JURNAL MathEdu (Mathematic Education Journal) Vol 9 No 1 (2026): JURNAL MathEdu (Mathematic Education Journal) Maret 2026
Publisher : Program Studi Pendidikan Matematika Institut Pendidikan Tapanuli Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37081/mathedu.v9i1.7804

Abstract

Abstract This study aims to reveal the mathematical concepts embedded in the weaving activities of Buna woven-cloth artisans in Letmafo Village, Central Insana District, North Central Timor Regency. This research employed a qualitative ethnographic approach. Data were collected through observation, interviews, and documentation with three main informants: a traditional leader and two experienced weavers. Data analysis used domain, taxonomy, componential, and cultural-theme stages. The findings show that weaving activities contain mathematical elements such as counting (the number of threads and repeated patterns), measuring (length and width of the cloth using non-standard units such as hand-span), and designing (forming geometric patterns such as squares, triangles, rhombuses, and lines of symmetry). Ethnomathematics in the Buna motif reflects an integration between local culture and mathematical concepts of geometry and number patterns that can be used as contextual learning resources. Keyword: Ethnomathematics, Buna woven cloth, Letmafo culture, mathematics learning
Pengembangan Lembar Kerja Siswa Materi SPLDV untuk Meningkatkan Hasil Belajar Siswa Melalui Pendekatan Matematika Realistik Deni Taniu; Lailin Hijriani; Yohanes Jefrianus Kehi; Meiva Marthaulina Lestari Siahaan; Fitriani
Media Pendidikan Matematika Vol. 13 No. 2 (2025): J-MPM
Publisher : Program Studi Pendidikan Matematika, FSTT, Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/mpm.v13i2.16740

Abstract

This research is motivated by the lack of worksheets development (LKS) at school based on the Realistic Mathematics Approach (RMA), which has resulted in low student mathematical abilities, especially in solving system of linear equations in two variables. This research aims to produce valid, practical, and effective Student Worksheets (LKS) based on the Realistic Mathematics Approach (RMA) for algebra. The research aimed to improve students' mathematical abilities, which will impact student learning outcomes. The research type is research and development (R&D) using the 4-D model. The target population of this study was 20 students of class VIIIA at Junior High School Neonbat. The instruments used were expert validation sheets, student response questionnaire sheets, and pretest and posttest questions. The results of the study showed that the quality of the student worksheets met the validity criteria, with an average value of 84.78% in the very valid category. The results of the LKS practicality questionnaire showed an average score of 90.6% in the very practical category. While in terms of effectiveness, it met the effective criteria. The average individual score for the pretest results was 24.5. However, it increased after using the student worksheet as indicated by the posttest results with an average value of 79.5. The percentage of classical completion based on the posttest results was 80%, which is included in the effective category. So that, the student worksheet for algebra material through realistic mathematics approach met the criteria of valid, practical, and effective.
Analysis of Student Errors in Solving SPLDV Story Problems Based on Visual Learning Styles Maria Fatima Luruk; Lailin Hijriani; Yohanes Jefrianus Kehi
MATH-EDU: Jurnal Ilmu Pendidikan Matematika Vol. 10 No. 3 (2025): MATH-EDU: Jurnal Ilmu Pendidikan Matematika
Publisher : Program Studi Pendidikan Matematika, Fakultas Ilmu Pendidikan, Universitas Timor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32938/jipm.v10i3.10555

Abstract

This study aims to describe the types of errors and the factors that cause students' errors in solving SPLDV story problems from a visual learning style perspective. The type of research used is descriptive qualitative. The research subjects consisted of Class VIII at SMP Negeri 2 Malaka Barat, who were identified as having a visual learning style. The research instruments were essay tests on SPLDV word problems and interview guidelines. Students' errors were analyzed using Kastelan’s theory, which classifies errors into conceptual, procedural, and technical. The results showed that students with visual learning style still made various errors, including (1) conceptual errors, such as inability to construct mathematical models from word problems and misapplying elimination or substitution methods; (2) procedural errors, such as failing to write systematic solving steps and not completing problems until the final stage; (3) technical errors, such as miscalculations and mistakes in copying numbers or variabels. The causes of errors came from internal factors (lack of conceptual understanding, inaccuracy, and difficulty in translating verbal information into symbolic form) and external factors (teaching methods with minimal visualization, an unconducive learning environment, and limited solving time).  
Co-Authors Abi, Roberto Agnes L A Halla Agustinus Giovandi Laki Aloisius Loka Son Ana Paula Tae Bano, Elinora Naikteas Camilo Andrés Rodríguez-Nieto Cecilia Novianti Salsinha Chrisinta, Debora Deni Taniu Dominifridus Bone Elisabeth E Mayori Fitriani Fitriani Handayani, Rika Hendrika Yeni Meti Hijriani, Lailin Ivonia Ulu Javier García-García Jeniana Martha Prima Asa Margareta Rodrigues Gomes Maria Fatima Luruk Maria Naimnule mariano Miko Purnomo mone, ferdinandus Naimnule, Maria Nelciana Talan Rika Handayani Roberto Abi Selestina Nahak Siahaan, Meiva Marthaulina Lestari Silfester Faentaono Simarmata, Justin Eduardo Tavares, Ricson Usifa, Inggrid Mariana Wua Laja, Yosepha Patricia Yakoba Yusina Muanley Zulkaidah Nur Azhan