Abstrak. Jenis penelitian ini merupakan penelitian kualitatif dengan menggunakan pendekatan deskriptif. Subjek penelitian ini adalah 3 siswa yang berasal dari salah satu sekolah swasta di Makassar yang memiliki nilai lapor matematika tertinggi dan pernah mengikuti olimpiade matematika. Untuk mengetahui aktivitas belajar siswa berprestasi dilakukan beberapa teknik pengumpulan data yaitu observasi, wawancara, dan catatan lapangan. Adapun teknik analisis data yang digunakan yaitu pemaparan data, reduksi data, penyajian data, kesimpulan dan verifikasi. Berdasarkan hasil penelitian dan pembahasan diperoleh aktivitas belajar matematika siswa berprestasi yaitu memperhatikan dan mendengarkan penjelasan guru dengan baik, menulis/mencatat materi yang ditulis oleh gurunya, aktif dalam proses pembelajaran, menjadi tutor, segera mengerjakan tugas yang diberikan oleh gurunya, selalu mengerjakan soal-soal latihan olimpiade, selalu meluangkan waktu untuk belajar matematika baik di sekolah maupun diluar sekolah, belajar matematika di berbagai referensi, mengikuti bimbingan belajar olimpiade di sekolah, mengikuti bimbingan belajar atau kursus di luar sekolah, mengikuti karantina di sekolah sebelum lomba olimpiade.Kata Kunci: Aktivitas belajar, siswa berprestasi, dan pembelajaran matematikaAbstract. The type of research is a qualitative research using descriptive approach. This subject research is 3 students who come from one of private schools in Makassar with highest score of mathematical and had ever followed mathematics olympiad. To know learning activities of student with high achievement SMP Islam Athirah Makassar conducted several techniques of data collection is observation, interview, and field notes. The data analysis techniques used are data exposure, reduction, presentation, conclusions and verification. Based on the result of research and discussion obtained learning activities of students with high achievement is pay attention and listen explanation well, writing / recording material written by her teacher, active on learning process, tutoring in class, always expressed opinion, became tutor in class, immediately doing the tasks given by her teacher, always doing the exercises of the Olympics, always taking the time to study mathematics in school and outside school, studying mathematics in various references, following the tutorial of studying olympiad at school, follow the guidance of study or courses outside school, follow the quarantine at school before the Olympic race.Keywords: Learning activities, students with high achievement, and learning mathematics.