<![CDATA[Penelitian ini bertujuan untuk mengetahui pengaruh penerapan Problem Based Learning(PBL) dipadu dengan aktivitas kolaboratif menggunakan True or False Strategy terhadapkemampuan berpikir kritis siswa SMA kelas XI pada materi pokok gerak parabola.Penelitian dilaksanakan dengan metode eksperimen semu (Quasi Experimental) denganmelibatkan adanya kelas eksperimen dan kelas kontrol. Populasi penelitian adalah seluruh siswakelas XI semester 1 SMAN 1 Kalasan Tahun Ajaran 2016/2017. Sampel diambil dengan teknikcluster random sampling, sebanyak 2 kelas. Instrumen yang digunakan dalam penelitian iniadalah perangkat pembelajaran berupa Rencana Pelaksanaan Pembelajaran (RPP) dan LembarKerja Siswa (LKS), rubrik penilaian kemampuan berpikir kritis, lembar observasi pelaksanaanpembelajaran, soal pre-test dan soal post-test. Data dianalisis dengan uji t sampel independen(Independent Sample T-Test) dan dicari nilai gain kemampuan berpikir kritisnya untukmengetahui besar peningkatannya.Hasil penelitian menunjukkan bahwa: 1) terdapat pengaruh penerapan PBL dipadu denganaktivitas kolaboratif menggunakan True or False Strategy terhadap kemampuan berpikir kritissiswa SMA kelas XI pada materi pokok gerak parabola; 2) Kemampuan berpikir kritis siswapada kelas eksperimen mengalami peningkatan sebesar 52% sedangkan kelas kontrol sebesar26%; 3) Pembelajaran dengan PBL dipadu dengan aktivitas kolaboratif menggunakan True orFalse Strategy memberikan hasil lebih baik dalam membangun keterampilan berpikir kritissiswa.Kata kunci: berpikir kritis, Problem Based Learning, aktivitas kolaboratif This study aims to determine the effect of using Problem Based Learning (PBL) combinedwith collaborative activities true or false strategy on critical thinking skills of high schoolstudents class XI in projectile motion.Research conducted by a quasi-experimental method involving the experimental class andcontrol class. The population was all students of class XI SMAN 1 Kalasan, first semester ofAcademic Year 2016/2017. Samples were taken using cluster random sampling, as many as twoclasses. The instrument used in this study is a learning device in the form of Lesson Plan (RPP)and Student Worksheet (LKS), critical thinking skills assessment rubrics, observation sheets oflearning implementation, pre-test and post-test questions. Data were analyzed by independent sample t test and finding the value of critical thinking skills gain to know their improvement.The results showed that: 1) there is an effect of the application of PBL combined withcollaborative activities using True or False Strategy on critical thinking skills of high schoolstudents class XI in projectile motion; 2) critical thinking skills of students in the experimentalclass increased by 52% while the control group by 26%; 3) Learning with PBL combined withcollaborative activities using True or False Strategy provides better results in developingstudents critical thinking skills.Keywords: critical thinking, Problem Based Learning, collaborative activity]]>
