<p class="StyleAuthorBold"><strong>Abstrak</strong></p><p>Revolusi industri 4.0 secara tidak langsung mengharuskan kemampuan berpikir kritis tingkat tinggi. Penelitian bertujuan untuk meningkatkan kemampuan berpikir kritis peserta didik dengan penerapan model <em>Problem-Based Learning </em>(PBL). Metode penelitain yang digunakan adalah Penelitian Tindakan Kelas (PTK) melalui 2 siklus pembelajaran. Penelitian merupakan penelitian populasi dengan jumlah 16 orang siswa Teknik Komputer dan jaringan (TKJ) SMK Muhammadiyah 1 Padang. Teknik pengumpulan data menggunakan tes hasil belajar dan eknik analisis data menggunakan deskriptif. Hasil penelitian yang diperoleh pada siklus 1 adalah kemampuan berpikir kritis peserta didik memperoleh nilai sebesar 62% pada kategori tuntas dengan nilai rata-rata yaitu 74, nilai tertinggi 88 dan nilai terendah 50. Sementara pada siklus 2 terjadi peningkatan dengan ketuntasan nilainya sebesar 100%, nilai rata-rata yaitu 79, nilai tertinggi 85, dan nilai terendah 75. Berdasakan hasil penelitian, maka dapat disimpulkan bahwa terjadi peningkatan kemampuan berpikir kritis peserta didik dengan menggunakan model PBL.</p><p> </p><p class="StyleAuthorBold"><strong><em>Abstract</em></strong></p><p><em>The industrial revolution 4.0 indirectly requires high-level critical thinking skills. The research aims to improve students' critical thinking skills by applying the Problem-Based Learning (PBL) model. The research method used was Classroom Action Research (CAR) through 2 learning cycles. The research is a population study with a total of 16 students of Computer and Network Engineering </em>(TKJ)<em> </em>SMK Muhammadiyah 1 Padang<em>. Data collection technique using test and data analysis technique using descriptive. The results obtained in cycle 1 are the students' critical thinking skills scored 62% in the complete category with an average value of 74, the highest value of 88 and the lowest value of 50. While in cycle 2 an increase with 100% completeness is a value, the average value is 79, the highest value is 85, and the lowest value is 75. Based on the results of the research, it can be concluded that an increase in students' critical thin</em><em>king skills using the PBL model.</em></p>
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