Penelitian ini bertujuan untuk menghasilkan media modul ajar matematika materi mengenal pecahan berbasis pendekatan matematika realistik untuk kelas V SD yang ditinjau dari validasi ahli media dan validasi ahli materi, angket respon siswa dan angket respon guru terhadap ketertarikan dan kepraktisan modul ajar, serta untuk mengetahui dampak penggunaan modul ajar ditinjau dari hasil belajar siswa. Penelitian ini merupakan penelitian dan pengembangan (Research and Development). Prosedur pengembangan menggunakan model pengembangan ADDIE. Penilaian kelayakan media modul ajar ditinjau dari validasi ahli media dan validasi ahli materi. Validasi ahli media diperoleh skor persentase sebesar 94% dan validasi ahli materi diperoleh skor persentase sebesar 95% sehingga mendapat kategori sangat layak. Hasil angket respon siswa terhadap ketertarikan modul pada saat implementasi di kelas uji coba diperoleh skor persentase sebesar 87% dan 88% di kelas penelitian. Adapun hasil angket respon guru terhadap kepraktisan modul pada saat implementasi di kelas uji coba diperoleh skor persentase sebesar 96% dan 98% di kelas penelitian. Dapat disimpulkan bahwa hasil angket respon siswa dan angket respon guru terhadap ketertarikan dan kepraktisan modul mendapat kategori sangat tertarik dan sangat praktis. Tes hasil belajar siswa mendapat skor rata-rata sebesar 91, sedangkan hasil tes awal siswa mendapat skor rata-rata sebesar 57. Hal tersebut terlihat adanya kenaikan skor rata-rata dari hasil tes awal siswa dengan tes hasil belajar siswa.

Kata Kunci: Penelitian dan Pengembangan, Modul Ajar, Pendekatan Matematika Realistik, Model ADDIE

This study aimed to develop a mathematics teaching module on introductory fractions using a realistic mathematics approach for fifth graders, which was reviewed by media and material expert validation, and student and teacher response towards interest and practicality of teaching modules, as well as to determine the impact of using teaching module to student learning outcomes. This research is research and development using the ADDIE development model. Media and material expert validation assessed teaching module feasibility media. The validation result showed that the teaching module is very decent to be applied, as the media expert validation granted a percentage score of 94%, and the material expert validation obtained a percentage score of 95%. Additionally. The student interest in the teaching module in the trial class obtained a percentage score of 87% and 88% in the research class. Significantly, the teacher categorized the teaching module on practicality in the trial class at 96% and 98% in the research class. Students' and teachers' responses to the teaching module indicated that the teaching module is a very interesting and practical category. Furthermore, the student's achievement was significantly improved by 60%, where the pre-test mean score was 57, and the post-test mean score was 91. Keywords: Teaching Module, Realistic Mathematics Approach, ADDIE Model