<![CDATA[Penelitian ini bertujuan untuk mendeskripsikan aktivitas guru dalam penerapan model pembelajaran berdiferensiasi berbasis kesiapan belajar untuk mendukung kemampuan penalaran matematis siswa SMP, mendeskripsikan aktivitas siswa saat penerapan model pembelajaran berdiferensiasi berbasis kesiapan belajar untuk mendukung kemampuan penalaran matematis siswa SMP, dan mendeskripsikan kemampuan penalaran matematis siswa SMP setelah menerapkan model pembelajaran berdiferensiasi berbasis kesiapan belajar. Penelitian ini menggunakan metode penelitian deskriptif kuantitatif dengan desain One Shot Case Study. Berdasarkan hasil analisis data diperoleh sebagai berikut: Aktivitas guru menggunakan model pembelajaran berdiferensiasi berbasis kesiapan belajar memperoleh presentase 89,3% pada kategori sangat baik. Aktivitas siswa saat pembelajaran menggunakan model pembelajaran berdiferensiasi berbasis kesiapan belajar pada materi statistika penyajian data memperoleh rata – rata presentase 76,8% pada kategori baik. Hasil tes kemampuan penalaran matematis siswa dari 26 siswa apabila dihitung secara klasikal memperoleh presentase sebesar 73,1% dalam kategori minimal tinggi.Kata Kunci: Pembelajaran Berdiferensiasi, Kesiapan Belajar, Kemampuan Penalaran Matematis Siswa. This research aims to describe the teacher’s activities in applying the differentiated learning model based on students readiness to support the mathematical reasoning skill SMP student, describe student activities in applying the differentiated learning model based on students readiness to support the mathematical reasoning skill SMP student, and describe the mathematical reasoning skill SMP student after applying the differentiated learning model based on students readiness. This research used a quantitative descriptive research method with the One Shot Case Study design. Based on the result of data analysis, the following results were obtained: The teacher’s activities during differentiated learning model based on students readiness were get score 89,3% in very good category. Student activities during the differentiated learning model based on students readiness were get an average score 76,8% in good category. The mathematical reasoning skill of 26 students obtained a percentage of 73,1% in minimum high category.Keywords: Differentiated Learning, Students Readiness, Mathematical Reasoning Skill Student.]]>
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