Penelitian ini adalah untuk mengetahui seberapa keefektifan pendekatan Realistic Mathematics Education (RME) dengan media papan hitung berdemontrasi terhadap hasil belajar matematika kelas III SDN Pandean Lamper 01 Semarang. Jenis penelitian ini adalah kuantitatif. Desain penelitian yang digunakan adalah Pre- eksperimental One Group Pretest-Posttest . Populasi penelitian ini adalah seluruh siswa kelas IIIA SDN Pandean Lamper 01 Semarang tahun ajaran 2017/2018. Sampel yang diambil adalah seluruh siswa kelas IIIA yang berjumlah 31 siswa dengan menggunakan teknik sampling Non Probility Sampling. Berdasarkan analisis data hasil penelitian telah mendapatkan perlakuan bahwa hasil belajar Matematika yang dihitung Uji-t dengan jumlah = 31siswa dengan rata-rata Pretest 55,64 dan posttest 68,54. Hasil analisis dengan menggunakan uji-t diperoleh t_hitung = 11,013 dan koefisian tersebut signifikan pada taraf 5% dengan derajat kebebasan 31 – 1 = 30 maka diperoleh t_tabel = 2,042 sehingga Ha diterima Ho ditolak. Sehingga dapat dikatakan bahwa “Keefektifan Pendekatan Realistic Mathematics Education (RME) dengan Media Papan Hitung Berdemontrasi Terhadap Hasil Belajar Matematika kelas III SDN Pandean Lamper 01 Semarang diterima kebenarannya.

Kata Kunci : Pendekatan Realistic Mathematics Education dengan Media Papan Hitung Berdemontrasi, Hasil Belajar Matematika.

Abstract: this research is to find out how the effectiveness of Realistic Mathematics Education (RME) approach with media of arithmetic boards beremontrasi to the results of learning mathematics class III SDN Pandean Lamper 01 Semarang. This type of research is quantitative. The research design used was Pre- experimental One Group Pretest-Posttest. The population of this research is all students of class IIIA SDN Pandean Lamper 01 Semarang academic year 2017/2018. The samples taken were all students of class IIIA which amounted to 31 students by using sampling technique of Non Probility Sampling. Based on data analysis, the result of the research has got the treatment that the mathematics learning result is t-tested with the number of = 31 students with the average of Pretest 55,64 and posttest 68,54. The result of analysis by using t-test is obtained tct = 11,013 and the coefficient is significant at 5% level with degrees of freedom 31 - 1 = 30 then obtained ttable = 2.042 so that Ha received Ho rejected. So it can be said that "The Effectiveness of Realistic Mathematics Education Approach (RME) with Counting Media Demonstrated to the Result of Mathematics class III SDN Pandean Lamper 01 Semarang accepted the truth

Keywords: Realistic Mathematics Education Approach with Calculated Hall Media Calculate, Mathematics Learning Outcomes.