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All Journal Jurnal Cendekia : Jurnal Pendidikan Matematika Griya Journal of Mathematics Education and Application
James Mangobi
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Education Mathematics

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Penerapan Model Osborn dalam Pembelajaran Matematika Materi Bentuk Aljabar di Kelas VII SMP Negeri 3 Tondano Leonardus Turang; Cori Pitoy; James Mangobi
Jurnal Cendekia : Jurnal Pendidikan Matematika Vol 10 No 2 (2026): Jurnal Cendekia: Jurnal Pendidikan Matematika Volume 10 Nomor 2 Tahun 2026
Publisher : Mathematics Education Study Program

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/cendekia.v10i2.4986

Abstract

Kesulitan siswa memahami konsep aljabar menjadi latar belakang penelitian ini sehingga tujuan penelitian ini untuk mengetahui apakah rata-rata hasil belajar setelah diterapkan model Osborn lebih baik dari model pembelajaran langsung pada materi bentuk aljabar. Penelitian menggunakan pendekatan kuantitatif dengan metode quasi-experiment dan desain Posttest Only Control Group Design. Pengumpulan data dilakukan melalui tes tertulis berupa 5 soal uraian. Sampel diambil dari 2 kelas yaitu kelas VII A sebagai kelas kontrol dengan 22 siswa dan kelas VII B sebagai kelas eksperimen dengan 22 siswa, dipilih menggunakan teknik random sampling setelah dilakukan uji homogenitas dan uji kesamaan. Teknik analisis data menggunakan uji-t sampel independen. Validitas instrumen diverifikasi oleh validator ahli meliputi dosen dan guru matematika. Hasil penelitian menunjukkan rata-rata nilai posttest kelas eksperimen (88,73) lebih tinggi secara signifikan dibandingkan kelas kontrol (77,59), dengan thitung = 21,35 > ttabel= 2,018 pada α = 0,05. Hal ini menunjukkan bahwa model Osborn secara signifikan meningkatkan hasil belajar siswa pada materi bentuk aljabar dibandingkan model pembelajaran langsung.
Optimalisasi Produksi Bakso dengan Menggunakan Pendekatan Integer Linear Programming Pada Rumah Makan Jawa Lumintu David Kapele; James Mangobi
Griya Journal of Mathematics Education and Application Vol. 6 No. 2 (2026): Juni 2026
Publisher : Pendidikan Matematika FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/griya.v6i2.1189

Abstract

Micro, small, and medium enterprises (MSMEs) in the culinary sector often face production planning problems due to limited raw materials and production decisions based on estimation. This study aims to determine the optimal production quantities of several meatball variants at Rumah Makan Jawa Lumintu using Integer Linear Programming (ILP) assisted by POM-QM for Windows. This research is an applied quantitative study in Operations Research. Data were collected through observation and interviews regarding raw material composition, production output, inventory availability, and the production system. A mathematical model was developed to maximize total meatball production by considering raw material constraints, minimum production requirements, and integer restrictions. The results showed that the optimal production combination in a four-day production cycle consists of 5942 regular meatballs, 150 tenes meatballs, 200 tendon meatballs, and 50 super meatballs, yielding a maximum production of 6342 meatballs. Compared with the actual production of 5320 meatballs, the optimization model increased output by 1022 meatballs or 19,21%. Therefore, ILP assisted by POM-QM for Windows can be used as an effective tool for more optimal, efficient, measurable, and data-driven production planning.
Co-Authors David Kapele Leonardus Turang Pitoy, Cori