Penelitian ini dilatarbelakangi oleh rendahnya keterampilan menulis teks laporan hasil observasi siswa kelas XB SMA Negeri 02 Tambusai. Permasalahan yang ditemukan meliputi rendahnya minat siswa dalam menulis, kesulitan menemukan ide, kurangnya pemahaman terhadap struktur teks laporan hasil observasi serta penggunaan model pemeblajran yang kurang menarik. Penelitian ini bertujuan untuk mendeskripsikan proses dan hasil peningkatan keterampilan menulis teks laporan hasil observasi melalui penerapan model pembelajaran game based learning berbantu media kartu acak. Jenis penelitian ini adalah penelitian tindakan kelas (PTK) yang dilaksanakan dalam dua siklus. Setiap siklus terdiri atas tahap perencanaan, pelaksanaan tindakan, observasi dan refleksi. Subjek penelitian adalah siswa kelas XB SMA Negeri 02 Tambusai yang berjumlah 33 siswa. Teknik pengumpulan data dilakukan melalui tes observasi, tes keterampilan menulis, tes tindakan guru dan dokumentasi. Data dianalisis secara deskriptif kuantitatif dan kualitatif. Hasil penelitian menunjukkan bahwa penerapan model game based learning berbantu media kartu acak dapat meningkatkan keterampilan menulis teks laporan hasil observasi siswa. Peningkatan terlihat pada aspek struktur teks, kelengkapan dan ketepatan isi, serta penggunaan kaidah kebahasaan. Selain itu siswa menjadi lebih aktif, antusias dan termotivasi dalam mengikuti proses pembelajaran. Dengan demikian model pembelajaran game based learning berbantu kartu acak efektif digunakan untuk meningkatkan keterampilan menulis teks laporan hasil observasi siswa kelas XB SMA Negeri 02 Tambusai. This research was motivated by the low writing skill of observation seport texts among students of class XB at SMA Negeri 02 Tambusai. The problems identified included students’low interest in writing, difficulties in generating ideas, lack of understanding of the structure of observation report texts, and the use of less engaging learning models. This study aimed to describe the process and the improvement of students’ writing skill in observation report texts through the implementation of the game based learning model assisted by random card media. This research used classroom action research (CAR) consisting of two cycles. Each cycle included planning, action, observation, and reflection stages. The subjects of this study were 33 students of class XB at SMA Negeri 2 Tambusai. Data were collected through observation, writing tests, and documentation. The data were analyzed using descriptive quantitative and qualitative techniques. The results showed that the implementation of the game based learning model assisted by random card media improved students’ writing skills in observation report texts. The improvement could be seen in the aspects of text structure, completeness and accuracy of content, and the use of language features. In addition, students became more active, enthusiastic, and motivated during the learning process. Therefore, the game based learning model assisted by random card media was effective in improving the observation report text writing skills of class XB students at SMA Negeri 2 Tambusai.
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