Penelitian ini bertujuan untuk mengetahui perbedaan kemampuan berpikir kreatif siswa sebelum dan sesudah menerapkan metode pembelajaran brainstorming pada mata pelajaran IPA. Jenis penelitian ini yaitu penelitian pre eksperimental. Desain penelitian yaitu one group pretest and posttest design. Populasi yaitu seluruh siswa kelas VII SMP Negeri 1 Pademawu. Sedangkan sampel yaitu kelas VII dengan menggunakan teknik purposive sampling. Teknik analisis data menggunakan uji t berpasangan. Berdasarkan hasil penelitian diperoleh: (1) kemampuan berpikir kreatif siswa meningkat dari nilai rata-rata pretest=27,10 menjadi posttest=73,15, (2) uji hipotesis diperoleh thitung = 20,049 ? ttabel = 2,069 (pada df 23 dan taraf signifikan 0,025) sehingga H0 ditolak dan H1 diterima. Jadi disimpulkan ada perbedaan setelah penerapan metode pembelajaran Brainstorming terhadap kemampuan berpikir kreatif siswa SMPN 1 Pademawu kelas VII.

This aims of research were to know the differences students creative thinking ability before and after by using brainstorming learning method on science. This research used a pre eksperiment method. The design used a pattern of one group pretest and posttest design. The population was all VII grade class in SMP Negeri 1 Pademawu. While the sample was VII A by using purposive sampling technique. The data analyzed technique by using uji paired sample t. Based on the result of the research it obtained that: (1) creative thinking ability increase from mean pretest=27,10 to posttest=73,15, (2) uji hypotheses tcount = 20,049 and ttable = 2,069 (on df 23 and significant level 0,025). It means that tcount ? ttable, then H0 is rejected and H1 is accepted. The conclution is they are the differences after by used brainstorming method learning to creative thinking ability students in science SMP Negeri 1 Pademawu of VII class.

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