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All Journal Ndrumi : Jurnal Ilmu Pendidikan dan Humaniora AFORE: Jurnal Pendidikan Matematika
Firman Pangaribuan
Universitas HKBP Nomensen, Indonesia
Agriculture, Biological Sciences & Forestry Arts Economics, Econometrics & Finance Education Languange, Linguistic, Communication & Media Mathematics

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PENGEMBANGAN BAHAN AJAR BERNUANSA ALAT MUSIK TRADISIONAL GAMELAN JAWA PADA MATERI LINGKARAN UNTUK MENINGKATKAN KEMAMPUAN PEMECAHAN MASALAH MATEMATIS DENGAN MODEL PROBLEM BASED LEARNING Rianda Sinaga; Hardi Tambunan; Firman Pangaribuan
Ndrumi : Jurnal Ilmu Pendidikan dan Humaniora Vol 9 No 1 (2026): Ndrumi : Jurnal Ilmu Pendidikan dan Humaniora
Publisher : LPPM Universitas Nias Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57094/ndrumi.v9i1.4570

Abstract

This study aims to develop mathematics teaching materials incorporating the traditional Javanese gamelan cultural context in the topic of circles to improve students’ mathematical problem-solving skills through the Problem Based Learning (PBL) model. The research employed a Research and Development (R&D) approach using the ADDIE development model, which consists of analysis, design, development, implementation, and evaluation stages. The research subjects included eighth-grade junior high school students, mathematics teachers, and instructional design and content experts. Data were collected using expert validation sheets, teacher and student response questionnaires, classroom observation sheets, and mathematical problem-solving ability tests. The data were analyzed using qualitative and quantitative descriptive techniques, including N-Gain analysis to measure improvements in students’ problem-solving abilities. The results indicate that the developed teaching materials are valid and practical for classroom use. Furthermore, the implementation of gamelan-based teaching materials integrated with the PBL model was proven effective in enhancing students’ mathematical problem-solving skills in circle topics. The integration of local cultural contexts into mathematics learning increases student engagement, strengthens conceptual understanding, and creates meaningful and contextual learning experiences. Therefore, the developed teaching materials are suitable as an innovative alternative for mathematics instruction at the junior high school level.
PEMBELAJARAN BERBASIS PROYEK TERHADAP KEMAMPUAN PEMAHAMAN KONSEP SISWA PADA MATERI BANGUN DATAR DI SD Averlin Kristiani Lahagu; Hardi Tambunan; Firman Pangaribuan
Afore : Jurnal Pendidikan Matematika Vol 5 No 1 (2026): Afore : Jurnal Pendidikan Matematika
Publisher : Universitas Nias Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57094/afore.v5i1.4556

Abstract

This study aimed to determine the effect of project-based learning on students’ conceptual understanding of plane geometry at Bintang Laut Private Elementary School, Telukdalam. The study employed a quantitative approach using a quasi-experimental method. The research subjects were fifth-grade students divided into an experimental group and a control group. The experimental group was taught using the project-based learning model, while the control group received conventional instruction. The research instrument was a conceptual understanding test on plane geometry administered before and after the treatment (pretest and posttest). The collected data were analyzed using descriptive and inferential statistics to identify differences in students’ conceptual understanding. The results revealed a significant improvement in students’ conceptual understanding in the experimental group after the implementation of project-based learning compared to the control group. Students taught through project-based learning demonstrated better abilities in understanding the properties of plane figures, applying formulas for area and perimeter, and relating mathematical concepts to real-life situations. These findings indicate that project-based learning is effective in enhancing elementary school students’ conceptual understanding of mathematics. Therefore, project-based learning is recommended as an innovative and contextual instructional strategy in elementary mathematics education.
Co-Authors Averlin Kristiani Lahagu Hardi Tambunan Rianda Sinaga