Penelitian ini dilatar belakangi rendahnya kemampuan pemecahan masalah matematika siswa dalam mengerjakan soal disebabkan keaktifan siswa kurang dalam mengkuti pelajaran dan siswa kurang memperhatikan guru dalam menyampaikan materi karena penerapan model pembelajaran dan media pembelajaran yang kurang inovatif. Penelitian ini bertujuan untuk mengetahui keefektifan model pembelajaran Two Stay Two Stray berbantu media roda pecahan pada materi pecahan terhadap kemampuan pemecahan masalah matematika siswa kelas V SD Negeri Kopek Godong Grobogan. Penelitian ini merupakan penelitian kuantitatif dengan rancangan penelitian One Group Pretest-Posttest Design. Populasi penelitian adalah 25 siswa kelas V SD Negeri Kopek Godong Grobogan. Sampel penelitian 25 siswa menggunakan teknik Nonprobability Sampling berbentuk Sampling Jenuh. Hasil uji rata-rata kemampuan pemecahan masalah dengan uji t satu sampel diperoleh        = 5,65 dan       = 1,71 jadi         >        maka Ho diterima artinya ketuntasan rata-rata sebesar 65. Uji banding kemampuan pemecahan masalah uji t dua sampel diperoleh        = 20,89 dan       = 1,71, jadi         >       . Kemampuan pemecahan masalah matematika siswa pada kelas V SD Negeri Kopek Godong Grobogan sesudah menggunakan model Two Stay Two Stray berbantu roda pecahan lebih baik dari sebelum menggunakan model Two Stay Two Stray berbantu roda pecahan. Kesimpulannya bahwa model Two Stay Two Stray berbantu media roda pecahan pada materi pecahan efektif terhadap kemampuan pemecahan masalah matematika siswa kelas V SD Negeri Kopek Godong Grobogan.

Kata kunci: model Two Stay Two Stray, media roda pecahan, kemampuan pemecahan masalah.

This research is motivated low mathematics problem solving ability of students in working a problem caused the liveliness of the students is less in the lesson anda students pay less attention  to the teacher in presenting the material due to the application of  model learning and media learning that are less innovation. The purpose of the research was find out the effectiveness learning Two Stay Two Stray model using wheels fraction media in teaching material of fraction to mathematic problem solving the fifth grade students of  Kopek Godong Grobogan. The research used quantitative design. The kind of design is One Group Pretest-Posttest Design. The population of the research is fifth grades students of SDN 1 Kopek Godong Grobogan. The sample are 25 students used Nonprobability Sampling as form Sampling Jenuh. The result of the t-test or  t0 one sample is 5.65 and the value  of t-table is 1.71,  so the result of t0 is higher than ttable. H0 is accepted for 65%. The value of t-test or t0 two sample is 20.89 and ttable is 1.71, so the result of t0 is higher than t-table. Based on the result of the study, using Two Stay Two Stray Model to mathematic problem solving ability is effective than before. The conclusion is that Two Stay Two Stray model using wheels fraction media  in teaching material of fraction to mathematic problem solving the fifth grade students of  Kopek Godong Grobogan.

Keywords: Two Stay Two Stray model, Wheels Fraction Media, problem solving ability.