Penelitian ini bertujuan untuk mengetahui (i) perbedaan hasil belajar kognitif antara peserta didik yang diajar dengan model pembelajaran Problem Based Learning (PBL) dengan peserta didik yang diajar dengan pembelajaran konvensional; (ii) berapa besar pengaruh model pembelajaran Problem Based Learning (PBL) terhadap hasil belajar kognitif peserta didik kelas XI SMK Negeri 02 Manokwari (studi pada materi pokok laju raksi) Penelitian ini menggunakanmetode penelitian kuasi eksperimen dengan desain post test-only control group designdengan melibatkan kelas XI Teknik Gambar B sebagai kelas eksperimen dan kelas XI Teknik Listrik B sebagai kelas kontrol. Teknik pengambilan sampel dilakukan secara purposive sampling. Kelas eksperimen menggunakan model pembelajaran Problem Based Learning (PBL) sedangkan kelas kontrol menggunakan pembelajaran konvensional. Instrumen yang digunakan untuk mengukur hasil belajar kognitif peserta didik berupa tes pilihan ganda. Analisis data yang digunakan untuk menganalisis data hasil penelitian adalah statistik deskriptif dan uji non parametrik (Mann Whiteney) dengan bantuan Software SPSS 22. Hasil penelitian ini menunjukkan bahwa (i) terdapat perbedaan hasil belajar kognitif peserta didik dalam penggunaan model pembelajaran Problem Based Learning (PBL) dengan peserta didik yang diajar dengan pembelajaran konvensional; (ii) terdapat pengaruh model pembelajaran Problem Based Learning (PBL) terhadap hasil belajar kognitif peserta didik sebesar 30%.

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<p><em>This research is a classroom action research (CAR) which aims to improve student learning outcomes in social studies subject matter through the use of the Google Meet application with the help of PowerPoint learning media. The sample in this study amounted to 12 students. The research method used is Classroom Action Research (CAR) in two cycles consisting of two meetings in each cycle. The stages of each cycle are planning, implementation, observation and reflection. In the first cycle, the students who completed the post test were 66.67%, and in the second cycle 91.67%. From this analysis, it can be seen from the increase in student learning outcomes in cycle I to cycle II. It can be concluded that the use of the google meet application with the help of powerpoint learning media can improve student learning outcomes, especially in Social Studies class VI SDN Randugunting 7 Tegal City.</em></p>

Research has been conducted which aims to determine the effect of the use (IPMLM) with the scaffolding approach to improve students' tolerance and students' self regulated learning in the Bima city and Pontianak city. The study was conducted using Pretest-Posttest Control Group Design. XI grade students in Bima city that is spread in three schools, and X grade students in the Pontianak city that are also spread in three schools used as research subjects. The subjects were selected by purposive sampling technique. The study was conducted in the second semester of the 2018/2019 academic year. The data were obtained through the questionnaire regarding the tolerance and self regulated learning. the results showed an increase in the students' tolerance and students' self regulated learning, This is proven by the gain score for students tolerance in the experimental class of 0.19. This value is higher than the gain score in the control class which is only 0.08 but the results in both classes are included in the "low" category. Furthermore, the gain score for self regulated learning the experimental class are also higher by 0.35 included in the category of "medium", while the gain score in the control class is only 0.15 included in the "low" category.

Telah dihasilkan komposisi busa yang efektif sebagai bahan peredam suara berdasarkan nilai koefisien absorbsi suara. Metode yang dilakukan adalah eksperimen, dengan mencampurkan bahan utama (polyurethan) dan bahan pengembang (isocyanate). Terdapat lima variasi penelitian, dengan cairan pengembang sebagai variabel kontrol. Adapun hasil yang diperoleh dari variasi pertama hingga kelima berturut-turut adalah 0,152; 0,072; 0,042; 0,028 dan 0,056. Dari hasil temuan berupa busa bahan poliurethan dapat disimpulkan bahwa semakin sedikit polyurethan yang ditambahkan semakin besar nilai koefisien absorbsi sehingga kemampuan meredam suara busa menjadi lebih baik.