AbstrakBuku ajar metode numerik haruslah memuat gambaran lengkap materi dan lebih menekankan pada implementasi metode, sehingga dapat menciptakan pembelajaran yang aktif dan interaktif. Penerapan pembelajaran kolaboratif yang diintegrasikan melalui buku ajar metode numerik akan menciptakan suasana pembelajaran yang mendorong mahasiswa untuk saling berinteraksi, bekerjasama, berbagi peran, tugas, dan tanggung jawab dalam menyelesaikan tugas atau masalah. Tujuan penelitian ini adalah untuk mengembangkan buku ajar metode numerik berbasis pembelajaran kolaboratif yang valid, praktis, dan efektif. Penelitian ini merupakan penelitian pengembangan Model Plomp yang terdiri dari tiga fase, yakni fase penelitian awal, fase membuat prototipe, dan fase penilaian dimana pada fase ini dilakukan uji validitas berdasarkan lembar validasi, kepraktisan berdasarkan angket respon dan keefektifan berdasarkan lembar observasi dan tes. Subjek penelitian adalah mahasiswa program studi pendidikan matematika IKIP PGRI Bali. Hasil yang diperoleh adalah buku yang dikembangkan layak digunakan, kepraktisan tergolong baik dan buku ajar metode numerik efektif digunakan dalam perkuliahan.Kata Kunci: Buku Ajar, Pembelajaran Kolaboratif, Penelitian Pengembangan  Development of Numerical Methods Textbook Based on Collaborative LearningAbstractNumerical method textbooks must contain a complete description of the material and put more emphasis on the implementation of the method, to create active and interactive learning. The application of collaborative learning that is integrated through numerical methods textbooks will create a learning atmosphere that encourages students to interact, collaborate, share roles, assignments, and responsibilities in solving assignments or problems. The purpose of this research is to develop a valid, practical, and effective numerical method textbook based on collaborative learning. This research is research on the development of the Plomp Model which consists of three phases, namely the preliminary research phase, the prototyping phase, and the assessment phase wherein this phase the validity test is carried out based on the validation sheet, the practicality is based on the response questionnaire and the effectiveness is based on the observation sheet and the test. The research subjects were students of the mathematics education study program at the IKIP PGRI Bali. The results obtained are that the book developed is suitable for use, the practicality is good and the numerical method textbook is effectively used in lectures.Keywords: Collaborative Learning, Development Research, Textbook.

Gender dan gaya belajar memiliki peran dalam belajar matematika. Penelitian ini bertujuan untuk menganalisis adakah perbedaan kemampuan pembuktian matematika berdasarkan gender dan gaya belajar. Penelitian ini merupakan penelitian komparatif dengan rancangan faktorial yang dilaksanakan di salah satu perguruan tinggi di Bali dengan subjek penelitian mahasiswa semester VII sebanyak dua kelas yang terdiri dari 33 mahasiswa. Pengumpulan data gender dan gaya belajar menggunakan angket, sedangkan data kemampuan pembuktian menggunakan tes pembuktian dalam mata kuliah analisis riil. Data yang diperoleh dianalisis dengan ANAVA dua arah. Hasil penelitian menunjukkan terdapat perbedaan kemampuan pembuktian di antara mahasiswa perempuan dan laki-laki serta perempuan memperoleh hasil yang lebih baik. Sedangkan berdasarkan gaya belajar, secara umum menunjukkan terdapat perbedaan kemampuan pembuktian di antara gaya belajar visual, auditori, dan kinestetik. Uji lanjut menunjukkan perbedaan yang signifikan terjadi antara gaya belajar visual dan kinestetik. Hasil analisis juga menunjukkan tidak terjadi interaksi antara gender dan gaya belajar dalam mempengaruhi kemampuan pembuktian matematika mahasiswa.

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Learning media is one of the most important learning tools in helping a teacher in delivering material, especially abstract material such as mathematics.Making learning media needs to follow technological advances, to obtain innovative learning media. One of the IT-based mathematics learning media is GeoGebra. Therefore, as a form of lecturer concern in helping teachers develop their abilities and skills in utilizing IT-based media, community service activities are carried out in the form of GeoGebra training as an innovative learning media. Training activities carried out at SMP N 4 Sukawati was in the form of introduction and training as well as GeoGebra assistance. Based on the training activities that have been carried out, it can be seen that the teacher shows an enthusiastic attitude and is willing to learn using GeoGebra software. Teachers quickly receive training materials and can operate or design the media, so the training provides positive feedback. Therefore, this training activity is expected to become an ongoing activity to improve the ability of teachers, especially in designing an IT-based learning media. As well as spreading the willingness of teachers to train skills in developing IT-based media to other schools.