Kooperatif Tipe Numbered Heads Together Terhadap Kemampuan Pemecahan Masalah Matematis Siswa di MTs  Unwanul Falah  Kupang Rejo  Kecamatan Punduh Pidada Kabupaten Pesawaran. Jenis penelitian yang digunakan adalah eksperimen semu (quasi  eksperimen). Populasi dalam penelitian ini siswa kelas VIII di MTs  Unwanul Falah  Kupang Rejo  Kecamatan Punduh Pidada Kabupaten Pesawaran Tahun Ajaran 2019/2020 yaitu sebanyak 70 orang siswa. Pengambilan sampel memakai metode non probability sampling. Uji hipotesis yang digunakan adalah uji t. Hasil Penggunaan model pembelajaran  NHT ini memberikan sumbangan yang signifikan terhadap kemampuan pemecahan masalah matematis siswa pada mata pelajaran matematika. Hasil penelitian diperoleh kemampuan pemecahan masalah siswa setelah diberikan model pembelajaran NHT lebih tinggi dibandingkan dengan kelas control yang tidak di beri NHT. Ada Pengaruh Pembelajaran Number Head Together Terhadap Kemampuan Pemecahan Masalah Matematis Pada Siswa Kelas VIII di MTs  Unwanul Falah  Kupang Rejo  Kecamatan Punduh Pidada Kabupaten Pesawaran Tahun Ajaran 2019/2020.

The purpose of this study was to determine the effect of the numbered head together learning model on students’ mathematical problem solving abilities at MTs Unwanul Falah Kupang Rejo, Punduh Pidada District, Pesawaran Regency. This study used quasi-experimental. The population of this study were 70 students at class VIII in MTs Unwanul Falah Kupang Rejo, Punduh Pidada District, Pesawaran Regency in Academic Year 2019/2020. The sample was taken by using non-probability sampling method. The hypothesis test of this study used the t test. The result of the use of the NHT learning model had made a significant contribution to students’ mathematical problem solving abilities ub mathematics. The results obtained by students’ problem solving skills after being given an NHT learning model were higher than the control class wich was not given the NHT. This could be seen from students who are given the NHT. There was an effect of learning numbered head together on student’ mathematical problem solving abilities in at class VIII in MTs Unwanul Falah Kupang Rejo, Punduh Pidada District, Pesawaran Regency In Academic year 2019/2020.