Tujuan penelitian ini adalah untuk mengetahui pengaruh model pembelajaran problem based intructions terhadap kemampuan pemecahan masalah siswa. penelitian ini dilaksanakan pada semester genap tahun ajaran 2015/2016 di sma muhammadiyah tarakan. jenis penelitian ini adalah quasi eksperimen dengan dengan rancangan nonequivalent control group design. populasi siswa kelas x dan sampel sebanyak 2 kelas. pengambilan sampel menggunakan teknik purposive sampling. teknik pengumpulan data menggunakan dokumentasi, tes uraian dan lembar observasi. berdasarkan pengujian statistik dengan menggunakan uji independent sample t-test diperoleh thitung 7,103 pada taraf signifikansi ? dan df = 66 diperoleh nilai ttabel 1,671 berarti thitung > ttabel. berdasarkan keterangan di atas hal ini menunjukkan bahwa terdapat pengaruh pengaruh model pembelajaran problem based intructions terhadap kemampuan pemecahan masalah siswa kelas x sma muhammadiyah tarakan.

The objective of this study was to determine the effect of problem based instruction learning model on students' problem-solving abilities. the study was conducted in the second semester of 2015/2016 school year at sma muhammadiyah tarakan. this study was a quasi experimental design by nonequivalent control group design. the population of students was tenth grade and the samples of this study were 2 classes. the used purposive sampling. the data collection technique of this study used documentation, test descriptions and observation sheet. based on statistical tests used independent sample t test obtained t-test 7.103 at significance level ? and df = 66 1,671 ttabel mean values obtained thitung> t tabel. based on the above it indicated that there were significant effects of problem based intructions learning model on problem-solving ability of tenth grade studens of sma muhammadiyah tarakan.