Penelitian ini bertujuan untuk mengetahui keefektifan model pembelajaran kooperatif tipe Numbered Heads Together (NHT) berbantu media papan berpetak materi bangun datar terhadap hasil belajar siswa kelas IV SDN Kalibeluk 01. Jenis penelitian ini adalah penelitian kuantitatif bentuk Pre- Eksperimental Design dengan desain One-Group Pretest-Posttest Design. Sampel yang diambil adalah 29 siswa dengan teknik Non Probability Sampling. Pengumpulan data diperoleh melalui tes hasil belajar, observasi, dokumentasi, dan wawancara.   Nilai   rata-rata   pretest yaitu   54,13   dan   posttest yaitu   80,68. Berdasarkan uji-t  dalam standar 5% diketahui thitung lebih besar dari ttabel (12,965

>  2,048)  maka  H0  ditolak  dan  Ha  diterima.  Ketuntasan  belajar  klasikal  yaitu sebesar 93,10%dinyatakan  tuntas  dan  6,90%dinyatakan  tidak  tuntas.  Sehingga

disimpulkan  bahwa model  pembelajaran  kooperatif tipe NHT berbantu  media papan berpetak efektif terhadap  hasil belajar matematika materi bangun datar siswa kelas IV SDN Kalibeluk 01.

Kata kunci: Numbered Heads Together, media papan berpetak

Abstract : This study aims to determine the effectiveness of the Numbered Heads Together (NHT) the type of cooperative learning model assisted by board media with flat build material on learning outcomes of fourth grade students of SDN Kalibeluk 01. This type of research is quantitative research in the form of Pre- Experimental Design with Pretest One-Group design and Posttest Design. The samples taken were 29 students with the Non Probability Sampling technique. Data collection is obtained through test of learning outcomes, observation, documentation and interviewsl. The average pretest score is 54.13 and posttest is

80.68. Based on the t-test in the 5% standard it is known to be greater than the table (12,965> 2,048) then H0 is rejected and Ha is accepted. Classical learning completeness that is equal to 93.10% is declared complete and 6.90% is declared incomplete. So it was concluded that the cooperative learning model of board- assisted NHT type was effectively plotted against the learning outcomes of mathematic in the material of flat building of fourth grade students of SDN Kalibeluk 01.

Keywords: Numbered Heads Together, board media.