<![CDATA[The purpose of this research was to know the influence of problem based learning model on students creative thinking skill in effect of human population density on environment subject matter which was held in SMP N 12 Bandar Lampung and sample were class VIIh and VIIi. Design of this research was quasi experiment with non equivalent pretest-postest. Quantitative data were KBK that obtained from pretest, postest and N-gain that were analyzed using t-test and u-test. Qualitative data was the result of students' activity and also students' response that were anlyzed descriptively. Creative thinking skill was included fluency and flexibillity. Gain of creative thinking skill average on experimental is 67,06% and control class is 56,24%. Based on the result of research, it can be concluded that problem based learning model can influence the creative thinking skill in effect of human population density on environment subject matter.Penelitian ini bertujuan untuk mengetahui pengaruh model pembelajaran Problem Based Learning terhadap kemampuan berpikir kreatif siswa pada materi pengaruh kepadatan populasi manusia terhadap lingkungan di SMP N 12 Bandar Lampung dengan sampel penelitian kelas VIIh dan VIIi. Penelitian ini merupakan penelitian eksperimen semu dengan desain pretest-postest non equivalen. Data kuantitatif berupa KBK yang diperoleh dari pretest, postest, dan N-gain yang dianalisis dengan uji t dan uji U serta data kualitatif berupa data aktivitas belajar dan tanggapan siswa dianalisis secara deskriptif. Kemampuan berpikir kreatif dalam hal ini meliputi fluency dan fleksibillity dengan rata-rata peningkatan kemampuan berpikir kreatif siswa pada kelas eksperimen (67,06%) dan kelas kontrol (56,24%). Berdasarkan hasil penelitian dapat disimpulkan bahwa model Problem Based Learning berpengaruh terhadap kemampuan berpikir kreatif pada materi pengaruh kepadatan populasi manusia terhadap lingkungan.Kata kunci: aktivitas siswa, kemampuan berpikir kreatif, problem based learning]]>
