Kegiatan pembelajaran matematika lebih banyak dilakukan dengan menanamankan konsep-konsep matematis kepada siswa, hanya saja pada pelaksanaannya tidak semua siswa mampu memahami konsep dengan baik. Tujuan dari penelitian ini yakni untuk memberikan variasi pembelajaran yang tepat dan efektif dalam kemapuan pemahaman konsep matematika pada meteri lingkaran. Penelitian ini merupakan jenis penelitian ekperimen semu (quasi ekperimen) dengan jumlah populasi yakni seluruh siswa kelas VII SMP. Penarikan sampel dilakukan dengan teknik random sampling, dengan jumlah sampel akhir yakni sebanyak 60 siswa. Pengumpulan data dalam penelitian dilakukan dengan teknik wawancara, observasi, dokumentasi, dan tes, dengan instrument penelitian berupa Bentuk instrumen tes berisi materi perkalian bilangan bulat. Data hasil penelitian kemudian dianalisis dengan menentukan atau menghitung skor mentah tiap-tiap anggota sampel yang dipilih secara acak, baik pada kelas eksperimen maupun kelas kontrol. Setelah itu dilakukan penghitungan rata-rata (mean) dan standar deviasi baik hasil tes siswa yang diajarkan dengan model pembelajaran matematika realistik berbantuan youtube maupun hasil tes siswa yang diajarkan dengan metode konvensional. Hasil analisis penelitian menunjukkan bahwa terjadi peningkatan kemampuan pemahaman konsep matematika rata-rata sebesar 0,8% dan dapat dikatagorikan tinggi menutur tabel skor N-Gain. Sehingga Ho ditolak dan Ha diterima dalam penelitian ini yaitu terdapat peningkatan kemampuan pemahaman konsep matematika siswa melalui pendekan matematika realistik berbantuan youtube.
The objectives of this study are to describe the types of speech acts used in Jokowi’s campaign speeches, to elaborate the realization of Jokowi used illocutionary act in campaign speeches, to know the reason of using illocutionary act. This study was conducted by descriptive qualitative research. The data of the research are the utterances of Jokowi’s speeches. The source of the data was Jokowi’s campaign speeches. The technique for collecting data is documentary technique. The technique of data analysis was interactive model by using Miles and Huberman. The findings show all types of speech acts were used in Jokowi’s campaign speeches, namely: locutionary act, illocutionary act can be classified into five parts; there were assertive, directive, commissive, expressive, declarative and the last types was perlocutionary act. The realization of illocutionary act used in Jokowi’s campaign speeches, the directive speech act was used in form of warning, commanding, promising, offering, questioning, requesting. The reasons of using illocutionary act in Jokowi’s campaign speeches are to point out or to identify what the speaker mean from his utterance, which influence of meaning and information of the speech and to get information clearly from Jokowi’s campaign speeches. Keywords: speech acts, campaign, campaign speeches
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