This is an open access article under the CC-BY-SA license (https://creativecommons.org/licenses/bysa/4.0/) ISSN 2337-9049 (print), ISSN 2502-4671 (online) Abstrak:Abstract: Penelitian ini bertujuan untuk mengetahui peningkatan keterampilan berpikir kritis peserta didik dengan menggunakan model discovery learning pada materi pemanasan global. Penelitian ini dilakukan pada kelas VII di SMP Negeri 2 Taman Pemalang tahun pelajaran 2018/2019. Pengambilan sampel penelitian menggunakan teknik multi stage random sampling dengan mengambil dua kelas dari populasi untuk kelas kontrol dan kelas eksperimen. Pengumpulan data menggunakan metode tes dengan soal uraian. Hasil penelitian menunjukkan bahwa kelas eksperimen yang menggunakan model discovery learning keterampilan berpikir kritis yang di diperoleh peserta didik meningkat. Hal ini ditunjukkan dari pada kenaikan persentase peserta didik yang mulanya 100% pada kategori kurang kritis menjadi 4% pada kategori sangat kritis, 56% kritis, 36% cukup kritis dan 4% kurang kritis. Kata Kunci : Discovery Learning; Keterampilan Berpikir Kritis; Pemanasan GlobalThis study aims to determine the increase in students' critical thinking skills by using discovery learning models on global warming material. This research was conducted in class VII at Taman Pemalang State Middle School 2 in the 2018/2019 academic year. Sampling research uses a multi-stage random sampling technique by taking two classes from the population for the control class and the experimental class. Data collection using test. The results showed that the experimental class that used the discovery learning model of critical thinking skills gained by students increased. This is shown from the increase in the percentage of students who initially 100% in the less critical category to 4% in the very critical category, 56% critical, 36% quite critical, and 4% less critical. PendahuluanPendidikan merupakan suatu usaha sadar dalam proses mengubah tingkah laku maupun sikap seseorang melalui pengajaran dan pelatihan baik disekolah maupun diluar sekolah. Menurut (Depdiknas, 2003) pendidikan merupakan suatu usaha sadar dan terencana untuk mewujudkan suasana belajar dan proses pembelajaran agar siswa secara aktif mengembangkan potensi dirinya. Pembelajaran menjadi salah satu bagian dari dunia pendidikan. Pendidikan merupakansuatu proses interaksi peserta didik dengan sumber belajar pada suatu lingkungan belajar meliputi guru dan siswa yang saling bertukar informasi.
This study aims to improve cognitive learning outcomes, critical thinking skills, and determine students' responses to the STAD type cooperative model with the concept map media. The study uses a Pre Test Post Test Comparation Group Quation Experiment Design. The sampling technique using Cluster Random Sampling, obtained 2 sample classes namely control class 32 experimental class 32. Data collection techniques using questionnaires, documentation, and tests. The research instrument was tested for validity and reliability. The data analysis technique uses Independent Sample T Test. The results showed a significant difference from the critical thinking skills and learning outcomes, namely the average value of the Post Test critical thinking ability of the experimental class 74.94 higher than the average value of the Post Test control class 65.78 and the average value of the Post Test learning outcomes cognitive experimental class 82.97 higher than the average value of the control class Post Test 66.75. There is an increase in the average N-Gain critical thinking of the experimental class 0.47 the moderate category is greater than the control class 0.2 the low category, while the cognitive learning outcomes of the experimental class 0.65 the medium category is greater than the control class 0.29 the low category. The results of students 'responses differed significantly between the experimental class and the control class, where the STAD learning model with concept maps can improve cognitive learning outcomes and students' critical thinking abilities.
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