PENERAPAN MODEL PEMBELAJARAN PROBLEM BASED LEARNING UNTUK MENINGKATKAN KEMAMPUAN BERPIKIR KRITIS SISWA PADA MATERI SUHU DAN KALOR

THE IMPLEMENTATION OF PROBLEM BASED LEARNING MODEL FOR INCREASING THE STUDENT CRITICAL THINKING ABILITY ON TEMPRATURE AND HEAT SUBJECT

Penelitian ini bertujuan untuk mendeskripsikan aktivitas pembelajaran, perubahan hasil kemampuan berpikir kritis siswa setelah pembelajaran menggunakan model pembelajaran problem based learning, dan respon siswa setelah mengikuti pembelajaran dengan model pembelajaran problem based learning pada suhu dan kalor. Metode penelitian ini menggunakan Pra-Eksperimental dengan desain one group pretest and posttest dengan sasaran penelitian sebanyak 36 siswa dari kelas VII-E SMP Negeri 2 Taman. Data diperoleh dengan metode observasi, tes, dan angket, lalu dianalisis secara deskriptif kuantitatif. Hasil penelitian menunjukan kategori sangat baik pada modus persentase keterlaksaan pembelajaran, dengan nilai 4 selama 2 minggu pertemuan. Kemampuan berpikir kritis siswa terbilang tinggi, hal ini ditunjukkan dari skor N-Gain yang diperoleh dengan kriteria tinggi 97% atau sebanyak 35 siswa sedangkan peserta didik yang berada pada kriteria N-Gain sedang sebesar 3% atau sebanyak 1 siswa. Hasil angket respon siswa terhadap pembelajaran sebesar 90,37 dengan katerogi sangat baik. Berdasarkan hal diatas, dapat disimpulkan bahwa penerapan model pembelajaran problem based learningdapat meningkatkan kemampuan berpikir kritis pada materi suhu dan kalor. Penelitian ini berkontribusi dalam memperluas dan memperkaya khazanah pembelajaran IPA dan serta kajian mengenai problem based learning dan diharapkan dapat diterapkan oleh guru dalam meningkatkan kualitas dan prestasi belajar siswa terutama kemampuan berpikir kritis dalam pembelajaran IPA dikelas.

This study aimed to describe the learning activities, a changes in the results of students' critical thinking skills after using a problem based learning model, and student responses after participating with problem based learning on model temperature and heat subject. This research method used pre-experimental design with one group pretest and post-test with the research target of 36 students from class VII-E 2^nd Taman Junior High School. The data were obtained by observation, tests, and questionnaires, and then analyzed on descriptive quantitative method. The results showed that the category was very good in the percentage of learning implementation, with a value of 4 for 2 weeks of meetings. The critical thinking ability of students is fairly high, this is indicated by the N-Gain score obtained with high criteria of 97% (35 students) while students who are on the medium N-Gain criteria are 3% (1 student). The results of the questionnaire on student responses to learning were 90.37 with very good categories. This study concluded that the application of the problem based learning model could improve critical thinking skills in the matter of temperature and heat. This research contributes to expanding and enriching the treasures of science learning and the study of problem based learning and is expected to be applied by teachers in improving the quality and achievement of students' learning, especially critical thinking skills in science learning in the classroom.