Penelitian ini bertujuan untuk mengetahui pengaruh pembelajaran IPA dengan menggunakan model PBL (Problem Based Learning) terhadap keterampilan berfikir kritis dan untuk mengetahui pengaruh pembelajaran IPA dengan menggunakan model PBL (Problem Based Learning) terhadap hasil belajar siswa kelas IV SD Negeri Tunjung 3 Burneh. Pendekatan penelitian yang digunakan adalah pendekatan kuantitatif-eksperimen dengan desain penelitian Nonequivalent Control Group Desain. Sampel yang digunakan teknik non probability sampling dengan jenis sistematis sampling dan dihitung dengan teknik solvin. Pengumpulan data pada penelitian berupa tas dan observasi. Hasil penelitian menunjukkan bahwa: Ada pengaruh signifikan pembelajaran IPA dengan menggunakan model PBL (Problem Based Learning)terhadap keterampilan berfikir kritis siswa kelas IV SDN Tunjung 3 Burneh. Dibuktikan t hitung = 7,49 > t tabel = 2,1009, maka Ho ditolak. Besar pengaruh model PBL terhadap variable terikat keterampilan berfikir kritis sebesar 75,7%. Sedangkan pada hasil belajar siswa kelas IV SDN Tunjung 3 Burneh. Dibuktikan t hitung = 5,22 > t tabel = 2,1009, maka Ho ditolak. Besar pengaruh model PBL terhadap variable terikat hasil belajar sebesar 60,3%. Keterlaksanaan pembelajaran model PBL terhadap keterampilan berfikir kritis dan hasil belajar yang diperoleh peneliti sebesar 100% sehingga dikatakan terlaksana dengan baik. Kata kunci: Model PBL (Problem Based Learning), Keterampilan Berfikir Kritis, Hasil Belajar.

This study has an objective to know the effects of Science learning by using PBL (Problem Based Learning) model on critical thinking ability and learning outcomes of fourth grade students of SD Negeri Tunjung 3 Burneh. Research approach that used is quantitative-experimental approach with research design of Nonequivalent Control Group Design. The sample uses non probability sampling technique with the systematic type of sampling and calculated by solvin technique. The collecting data in this study is in the form of test and observation. The results of the study show that: There is a significant effect of Science learning by using PBL (Problem Based Learning) model on critical thinking ability of fourth grade students of SD Negeri Tunjung 3 Burneh. It is proven by t count = 7.49 > t table = 2.1009, then Ho is rejected. The effect of PBL model on the dependent variable of critical thinking ability is 75.7%. Moreover, on learning outcomes of fourth grade students of SD Negeri Tunjung 3 Burneh is proven by t count = 5.22> t table = 2.1009, then Ho is rejected. The effect of PBL model on the dependent variable of learning outcomes is 60.3%. The implementation of PBL learning model on critical thinking ability and learning outcomes obtained by the writer is 100%, so it is said to be done well. Keywords: PBL (Problem Based Learning) Model, Critical Thinking Ability, Learning Outcomes.

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