Tujuan penelitian ini adalah untuk meningkatkan hasil belajar siswa mata pelajaran Matematika pada materi peluang kejadian saling lepas dengan media sampah melalui penerapan model pembelajaran Quantum Teaching Realistic (QTR). Subjek dalam penelitian adalah pada siswa kelas XII IPA 3 SMA Negeri 1 Pringgasela Semester 2 tahun pelajaran 2020/2021 berjumlah 30 orang. Objek penelitian adalah hasil belajar. Data hasil belajar siswa dalam mata pelajaran Matematika dikumpulkan menggunakan tes. Data dianalisis menggunakan teknik deskripsi kualitatif. Penelitian dikatakan berhasil bila memenuhi kriteria: (1) nilai rata-rata tes akhir pembelajaran Matematika materi materi peluang kejadian saling kepas minimal sebesar nilai KKM=75, dan (2) ketuntasan klasikal minimal 80%. Hasil analisis data menunjukkan terjadi peningkatan hasil belajar siswa setalah adanya penerapan model pembelajaran QTR. Pada siklus I nilai rata-rata yang diperoleh peserta didik sebesar 69,33 dengan ketuntasan belajar sebesar 60% sedangkan pada siklus II terjadi peningkatan yang cukup signifikan dengan nilai rata-rata siswa sebesar 84,00 dan ketuntasan belajar minimal sebesar 83,33%. Sehingga dapat disimpulkan bahwa penerapan model pembelaran QTR dengan media sampah pada materi peluang berhasil dan mendapatkan hasil yang memuaskan. Selain itu juga dengan adanya implementasi ini selain hasil belajar siswa yang meningkat teryata keaktifan serta motivasi siswa untuk belajar juga meningkat. The purpose of this study was to improve student learning outcomes in Mathematics subjects on the material of opportunities for mutually exclusive events with waste media through the application of the Quantum Teaching Realistic (QTR) learning model. The subjects in the study were students of class XII IPA 3 SMA Negeri 1 Pringgasela Semester 2 for the academic year 2020/2021 totaling 30 people. The object of research is learning outcomes. Data on student learning outcomes in Mathematics were collected using tests. The data were analyzed using a qualitative description technique. The research is said to be successful if it meets the following criteria: (1) the average value of the final test of Mathematics learning material for the probability of passing each other is a minimum of KKM = 75, and (2) classical completeness is at least 80%. The results of data analysis showed an increase in student learning outcomes after the implementation of the QTR learning model. In the first cycle the average value obtained by students was 69.33 with a learning completeness of 60%, while in the second cycle there was a significant increase with an average student score of 84.00 and a minimum learning mastery of 83.33%. So it can be concluded that the application of the QTR learning model with waste media on the material has the opportunity to succeed and get satisfactory results. In addition, with this implementation, in addition to increasing student learning outcomes, it turns out that student activity and motivation to learn has also increased.
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