Penelitian ini bertujuan untuk menghasilkan lembar kegiatan peserta didik berbasis Problem Based Learning untuk melatihkan kemampuan bepikir kreatif pada materi perubahan lingkungan yang valid, praktis, dan efektif. Penelitian ini menggunakan metode pengembangan Four D Models yaitu define, design, develop dan disseminate tetapi tanpa tahap disseminate. Berdasarkan hasil validasi yang dilakukan oleh validator diperoleh hasil modus dengan kategori sangat valid. Kepraktisan LKPD dilihat dari keterlaksanaan aktivitas peserta didik memperoleh persentase sebesar 92% pada LKPD 1 dan  persentase sebesar 96,3% pada LKPD 2. Keefektifan LKPD dilihat dari hasil belajar peserta didik dan respons peserta didik. Hasil belajar peserta didik dilihat dari ketuntasan hasil belajar memperoleh persentase sebesar 90% dan  rata-rata kemampuan berpikir kreatif peserta didik persentase sebesar 70% kategori kreatif. Respons peserta didik memperoleh persentase 93,75% dengan kategori terlaksana sangat baik menunjukkan LKPD yang dikembangkan efektif. Berdasarkan hasil tersebut dapat disimpulkan bahwa LKPD berbasis Problem Based Leaning untuk melatihkan kemampuan bepikir kreatif pada materi perubahan lingkungan adalah valid, praktis, dan efektif.

Kata kunci : LKPD, Problem Based Learning, Perubahan Lingkungan, Berpikir kreatif

The aims of research was produce student worksheet based problem based learning to train creative thinking ability in enviromental change topic which valid, practical, and effective. This research used Four D Models development method by define, design, develop but without disseminate. Based on validation result of validator was got modus with very valid category. Practical of student worksheet was seen from implementation students activity got percentage of 92% for the first student worksheet and got percentage of 96,3% for the second student worksheet. The effectiveness of student worksheet was seen from students learning outcome and students response. Learning outcomes was seen from completeness of learning outcomes got a percentage of 90% and the average ability of creative thinking of students got percentage of 70% creative category. Students response got percentage of 93,75% with done very well category showed that student worksheet which developed was effective. Based on that result can be implied students worksheet based problem based learning to train creative thinking ability in enviromental change topic were valid, practical, and effective.

Keyword : student worksheet, Problem Based Learning, enviromental change, creative thinking