<![CDATA[ABSTRAK: Penelitian ini bertujuan untuk memperoleh deskripsi tentang penerapan model Problem Based Learning dalam meningkatkan hasil belajar siswa pada materi aritmatika sosial di Kelas VII D SMP Negeri 19 Palu. Jenis penelitian ini yaitu Penelitian Tindakan Kelas (PTK) dengan mengacu pada desain penelitian Kemmis dan Mc. Taggart, yaitu 1) perencanaan, 2) pelaksanaan tindakan, 3) observasi, dan 4) refleksi. Penelitian ini dilaksanakan dalam dua siklus. Subjek penelitian adalah siswa kelas VII D SMP Negeri 19 Palu yang terdaftar pada tahun ajaran 2018/2019 sebanyak 30 siswa, 19 siswa perempuan dan 11 siswa laki-laki. Teknik pengumpulan data yaitu observasi, tes, wawancara, dan catatan lapangan. Pada siklus I banyaknya siswa yang tuntas yakni 22 siswa dengan persentase ketuntasan 73% dan pada siklus II banyak siswa yang tuntas yakni 25 siswa dengan persentase ketuntasan 83%. Hasil penelitian ini menunjukkan bahwa penerapan model Problem Based Learnig dapat meningkatkan hasil belajar siswa kelas VII D SMP Negeri 19 Palu, dengan mengikuti fase-fase PBL yaitu: 1) orientasi siswa pada masalah materi aritmatika sosial khususnya harga jual, harga beli, untung atau rugi, diskon dan persentase untung atau rugi 2) mengorganisasikan siswa untuk belajar dengan membentuk kelompok belajar secara koperatif, 3) membimbinng penyelidikan siswa secara mandiri maupun kelompok, 4) mengembangkan dan menyajikan hasil karya, dan 5) menganalisis dan mengevaluasi pemecahan masalah. Kata kunci : Problem Based Learning, Hasil Belajar, Aritmatika Sosial ABSTRAC: This study aims to obtain a description of the application of the Problem Based Learning model in improving student learning outcomes in social arithmetic material in Class VII D of SMP Negeri 19 Palu. This type of research is Classroom Action Research (CAR) with reference to the research design of Kemmis and Mc. Taggart, namely 1) planning, 2) implementation of actions, 3) observation, and 4) reflection. This research was conducted in two cycles. The research subjects were VII D grade students of SMP Negeri 19 Palu who were enrolled in the 2018/2019 school year as many as 30 students, 19 female students and 11 male students. Data collection techniques are observation, tests, interviews, and field notes. In the first cycle the number of students who completed were 22 students with a percentage of completeness 73% and in cycle II many students were completed ie 25 students with a percentage of completeness 83%. The results of this study indicate that the application of the Problem Based Learnig model can improve the learning outcomes of class VII D students of SMP Negeri 19 Palu, by following the PBL phases namely: 1) student orientation to the problem of social arithmetic material in particular the selling price, purchase price, profit or loss, discount and percentage of profit or loss 2) organize students to learn by forming cooperative learning groups, 3) guide students' investigations independently or in groups, 4) develop and present their work, and 5) analyze and evaluate problem solving. Keywords: Problem Based Learning, Learning Outcomes, Social Arithmetic]]>
