Geometry flat side material is crucial subject for students in senior high school. As the development of technology that increases very rapidly, it provides a chance to develop Media Interactive Learning (MPI) such as Course Lab MPI 2.4. This study was conducted to create a valid interactive multimedia teaching material, practical, and effective. Since there are correlated between spatial reasoning and student learning achievements, the influence of Course lab on the improvement of spatial reasoning is also seen. Spatial reasoning has three aspects that are mental rotation, spatial orientation, and spatial visualization. This study is a development model consisting plomp as design composed of three phases. The results obtained through this research interactive multimedia teaching material course lab based on geometry flat side were valid, practical, and effective. Students’ test scores average changed at 25 with a standard deviation of 7.07. The test results statistically demonstrated the value which means there were some differences in the average score of the initial test and final test. Course lab also led to improving students’ spatial reasoning. The multimedia developed was effective in improving both student learning achievements and spatial reasoning.
Abstrak. Penelitian ini dilatarbelakangi oleh kemampuan visualisasi mahasiswa terhadap pembelajaran geometri masih rendah dimana mahasiswa harus menggunakan alat peraga untuk memvisualisasikan materi geometri sehingga berdampak terhadap pemahaman dan hasil belajar mahasiswa. Tujuan penelitian ini adalah untuk menghasilkan modul aplikasi komputer dengan program wingeom yang valid untuk materi geometri ditinjau dari segi kelayakan isi, kelayakan bahasa, kelayakan penyajian dan mendeskripsikan efektifitas tentang hasil belajar mahasiswa setelah diberikan modul aplikasi komputer dengan program wingeom yang valid untuk materi geometri di Program Studi Pendidikan Matematika di STKIP PGRI Sumatera Barat. Model pengembangan penelitian ini menggunakan model rancangan ADDIE yang terdiri dari tahap analisis, desain, pengembangan, implementasi, dan evaluasi. Hasil penelitian ini adalah 1) menghasilkan modul aplikasi komputer dengan program wingeom yang valid setelah melalui tahap desain kemudian direvisi dengan nilai validitas aspek kelayakan isi 80,35%, nilai validitas aspek penyajian 73,61%, nilai validitas aspek kebahasaan 76,38%, dan nilai validitas kegrafikaan 71,43%. 2) keefektifan berdasarkan hasil belajar mahasiswa mengalami peningkatan nilai rata-rata mahasiswa dari nilai tes awal (pretest) ke nilai tes akhir (posttest) dengan nilai signifikan 5,68. Kesimpulan dari penelitian ini adalah modul aplikasi komputer dengan program wingeom untuk materi geometri dapat dikategorikan valid dan efektif.
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