AbstrakTujuan penelitian ini adalah untuk mengetahui perbedaan kemampuan komunikasi matematis siswa kelas X SMK Santo Aloisius Ruteng tahun ajaran 2017/2018 yang diajarkan dengan menggunakan model pembelajaran kooperatif tipe NHT dibandingkan dengan yang diajarkan dengan model pembelajaran langsung. Penelitian ini merupakan penelitian eksperimen dengan desain penelitian posttest only control group design. Populasi dalam penelitian ini adalah seluruh siswa kelas X jurusan Teknik Kendaraan Ringan (TKR) SMK Santo Aloisius Ruteng yang tersebar dalam tiga kelas. Dua kelas dipilih secara acak untuk dijadikan sampel penelitian. Kelas X TKR B terpilih sebagai kelas eksperimen yang diajarkan dengan menerapkan model pembelajaran kooperatif tipe NHT sedangkan kelas X TKR C diajarkan dengan model pembelajaran langsung. Data yang diperoleh dalam penelitian ini berupa skor kemampuan komunikasi matematis siswa yang dianalisis dengan uji t. Berdasarkan hasil analisis data diperoleh bahwa kemampuan komunikasi matematis siswa yang menggunakan model pembelajaran kooperatif tipe NHT lebih tinggi dibandingkan dengan kemampuan komunikasi matematis siswa yang menggunakan model pembelajaran langsung.Abstract (Effect Of Cooperative Learning Model Of Numbered Head Together Type On Mathematical Communication Ability)This study was aimed to determine the effect of cooperative learning model NHT type towards students’ mathematical communication skill of grade X SMK Santo Aloisius Ruteng in academic year 2017/2018. This study was experimental research with post-test only control group design. The population of this study was all the tenth-grade students majoring in Teknik Kendaraan Ringan (TKR). X TKR B selected as an experimental class taught by applying cooperative learning type NHT while X TKR C taught by direct learning model. The data obtained was analyzed by t-test. Analysis data result obtained that students’ mathematical communication skill that using cooperative learning type NHT is higher than students’ mathematical communication skill that using direct learning model.
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