<p>Penelitian ini bertujuan untuk mengetahui pengaruh Model Pembelajaran Snowball Throwing terhadap hasil belajar siswa pada materi Sistem Pertahanan Tubuh. Penelitian ini dilaksanakan selama 2 bulan. Penelitian ini menggunakan metode eksperimen semu (Quasi experiment) dengan populasi penelitian seluruh siswa di kelas XI yang terdiri 2 kelas dengan jumlah 64 siswa dan sampel penelitian siswa kelas XI IPA<sup>1</sup> yang terdiri dari 35 siswa, penentuan sampel dilakukan secara Random sampling. Instrumen dalam penelitian ini adalah tes hasil belajar berupa pre-test dan post-test. Hasil belajar siswa yang menggunakan model pembelajaran Snowball Throwing diperoleh nilai yang tuntas adalah sebanyak 29 siswa (82,86%) dan yang tidak tuntas sebanyak 6 siswa (17,14%) dengan nilai rata-rata 77,8 dan standar deviasi 9,06. Hasil uji normalitas diperoleh L<sub>hitung</sub><L<sub>tabel </sub> atau 0,1269<0,1497 dinyatakan bahwa data berdistribusi normal sedangkan uji homogenitas diperoleh F<sub>hitung</sub><F<sub>tabel </sub>= 1,04<1,776 dinyatakan data mempunyai varians yang sama atau homogen. Hasil uji hipotesis menggunakan uji t diperoleh t<sub>hitung</sub>> t<sub>tabel</sub> atau 14,27>1,69 dengan taraf kepercayaan 0,05 maka H<sub>a</sub> diterima H<sub>o</sub> ditolak, sehingga dinyatakan bahwa ada pengaruh yang signifikan penggunaan model pembelajaran Snowball Throwing terhadap hasil belajar siswa pada materi Sistem Pertahanan Tubuh di Kelas XI SMA Istiqlal Delitua Medan.</p>
This paper discusses the effect of the PBL (Problem-Based Learning) learning model on students' math arithmetical skills in integer material in class V of MIS Perdamean Sigambal, Rantauprapat, North Sumatra Province in the academic year 2020/2021. The research uses quantitative research (Quasi Experiment) with the research sample determined by total sampling technique. The population of the research was 30 students, which consists of 15 students in class V-A as the control class and 15 students in class V-B as the experimental class. The results indicate that students' arithmetic skills using the PBL learning model were in the very good category with an average score of 87.2. The hypothesis results that have been carried out indicate tcount 2.658 > ttable, 1.701 at a confidence level of 0.05. Thus, there is a significant effect of applying the PBL (Problem-Based Learning) learning model on students' arithmetical skills in class V of MIS Perdamean Sigambal Rantauprapat and it provides information to teachers in applying the PBL (Problem-Based Learning) learning model to improve students' thinking skills.
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