<![CDATA[The purpose of this research was to figure out the influence of PBL model on creative thinking skill at SMP N 20 Bandar Lampung. This research was quasi experiment and using purposive sampling tehnique, with VIIE as experiment class and VIIF as control class. The research data were quantitative data which were obtained from creative thinking skill test result that were analyzed by t-test and u-test and qualitative data which were obtained from students activity and students response that were analyzed descriptively. The result of this research showed that PBL can increas students creative thinking skill and students average score of experiment class (64,51) was higher than control class (36,39). There were improvement (82,76) and positive feedback by the students in terms of students activity. So, it could be concluded that PBL model gave significant influence to students creative thinking skill in environmental management subject matter.Penelitian ini bertujuan untuk mengetahui pengaruh model PBL terhadap kemampuan berpikir kreatif di SMP N 20 Bandar Lampung. Penelitian ini merupakan penelitian eksperimental semu menggunakan tehnik purposive sampling dengan VIIE sebagai kelas eksperimen dan VIIF sebagai kelas kontrol. Data penelitian berupa data kuantitatif yang diperoleh dari hasil tes KBK siswa yang dianalisis menggunakan uji-t dan uji-u serta data kualitatif yang diperoleh dari aktivitas siswa serta tanggapan siswa yang dianalisis secara deskriptif. Hasil penelitian menunjukkan bahwa penggunaan model PBL meningkatkan KBK siswa dan nilai rata-rata siswa kelas eksperimen lebih tinggi (64,51) dibanding kelas kontrol (36,39). Aktivitas siswa juga meningkat (82,76), serta mendapat tanggapan positif dari siswa. Sehingga, dapat disimpulkan bahwa model PBL berpengaruh signifikan terhadap KBK siswa pada materi pengelolaan lingkungan.Kata kunci : aktivitas siswa, berpikir kreatif, problem based learning]]>
