Range: Jurnal Pendidikan Matematika Vol. 1 No. 2 Tahun 2019 Irmina Veronika Uskono, dkk ISSN :2685-2373 PENERAPAN MODEL PEMBELAJARAN MATEMATIKA REALISTIK PADA POKOK BAHASAN BILANGAN BULAT Irmina Veronika Uskono*, Kristoforus Djawa Djong, Samuel Igo Leton ABSTRAK Tujuan dari penelitian ini adalah mendeskripsikan dan mengetahui keefektifan penerapan model Pembelajaran Matematika Realistik (PMR) dalam meningkatkan kemampuan siswa memahami pokok bahasan Bilangan Bulat pada siswa kelas VII salah satu SMP Negeri di Kota Kupang. Penelitian ini merupakan penelitian tindakan kelas, data dikumpulkan melalui observasi dan tes. Observasi dilakukan pada pra siklus dan pada setiap siklus, sedangkan tes dilakukan pada pra siklus, akhir setiap siklus dan pada akhir dari semua siklus penelitian. Berdasarkan hasil analisis deskriptif terhadap data observasi dan data hasil tes, disimpulkan bahwa; rata-rata data hasil observasi maupun rata-rata data hasil tes menunjukkan adanya peningkatan. Data hasil observasi kemampuan guru mengelola pembelajaran mengalami peningkatan dari siklus I ke siklus II sebesar 0,72. Rata-rata aktivitas siswa juga mengalami peningkatan dari siklus I ke siklus II sebesar 0,91. Rata – rata hasil tes belajar siswa pun menunjukkan peningkatan dari siklus I ke siklus II sebesar 2,89. Dan rata-rata ketuntasan hasil tes siswa secara klasikal juga mengalami peningkatan, yaitu sebesar 25,71%. Pada tes akhir, siswa yang memperoleh skor minimal 60 sebanyak 88,57%. Karena ketuntasan hasil belajar secara klasikal tercapai, kemampuan guru mengelola pemblajaran efektif, aktivitas siswa dalam pembelajaran efektif dan respon siswa terhadap pembelajaran positif, maka dapat disimpulkan bahwa penerapan model PMR dapat meningkatkan kemampuan siswa memahami materi Bilangan Bulat di SMP kelas VII. Kata kunci: Model Pembelajaran, Pembelajaran Matematika Realistik, bilangan bulat. ABSTRACT The purpose of this study is to describe and to know the effectiveness of the application of the Realistic Mathematics Education (RME) in improving student’s ability to understand the subject of integers in class VII students of one of the State Junior High Schools in Kupang City. This research is a classroom action research, data collected through observation and tests. Observations were made at the pre-cycle and each cycle, while the tests were carried out at the pre-cycle, the end of each cycle and the end of all research cycles. Based on the results of the descriptive analysis of observational data and test result data, it was conducted that; the average observation data and the average test result data show an increase. Data from observations of the ability of teachers to manage to learn has increased from cycle I to cycle II by 0.72. The average activity of students also increased from cycle I to cycle II of 0.91. The average student learning test results also showed an increase from cycle I to cycle II of 2.89. And the average completeness of student’s test results in a classic also increased, which is equal to 25.71%. at the final test, students who received a minimum score of 60 were 88.57%. Because the mastery of classical learning outcomes is achieved, the ability of teachers to manage effective learning, student activities ineffective learning, student activities in effective learning and student responses to positive learning, it can be concluded that the application of the RME can improve students’ ability to understand integers in class VII students. Keywords: learning model, realistic mathematic education, integers 138 Pendidikan Matematika Universitas Katolik Widya Mandira *veniuskono@gmail.com Dikirim: 30 Oktober 2019. Diterima: 07 Januari 2020. Dipublikasikan: 31 Januari 2020