<![CDATA[Penelitian ini bertujuan untuk mengetahui: (1) peningkatan kemampuan dan aktivitas pemecahan masalah matematika siswa melalui penerapan model pembelajaran ARIAS berbantuan video pembelajaran serta (2) tanggapan siswa terhadap penerapan model pembelajaran ARIAS berbantuan video pembelajaran. Jenis penelitian ini adalah penelitian tindakan kelas yang dilaksanakan dalam tiga siklus. Subjek dalam penelitian ini adalah semua siswa kelas X-1 SMA Laboratorium Undiksha Singaraja semester genap tahun ajaran 2016/2017, yaitu sebanyak 26 orang. Data kemampuan pemecahan masalah matematika siswa diperoleh dengan cara memberikan tes berupa soal uraian, sedangkan data aktivitas pemecahan masalah matematika siswa dikumpulkan dengan menggunakan lembar observasi yang dilengkapi dengan temuan-temuan selama pembelajaran berlangsung, dan tanggapan siswa dikumpulkan dengan menggunakan angket semi open ended dan komentar siswa. Selanjutnya data dianalisis secara deskriptif yang dipaparkan dalam bentuk uraian singkat, persentase, diagram, dan bukti fisik. Hasil penelitian menunjukkan bahwa rata-rata skor kemampuan pemecahan masalah matematika siswa pada siklus III telah memenuhi indikator keberhasilan yaitu sebesar 77,85 yang artinya berada dalam kategori tuntas. Sedangkan rata-rata skor aktivitas pemecahan masalah matematika siswa pada siklus III adalah 7,78 yang artinya berada dalam kategori aktif. Rata-rata skor tanggapan siswa berada dalam kategori positif sebesar 63,19.Terdapat pula temuan-temuan mengenai siswa sudah mampu untuk: (1) memahami masalah yang diberikan, (2) merencanakan strategi penyelesaian, (3) menyelesaikan permasalahan, dan (4) memeriksa kembali solusi yang diperolehnya.Kata Kunci : ARIAS, video, pemecahan masalah This research was aimed to know: (1) The improvement of students' mathematical problem solving ability and activity through the implementation of ARIAS learning model assisted by learning's video, (2) the students’ response towards the implementation of ARIAS learning model assisted by learning's video. This research was classroom action research which was conducted in three cycles. The subjects of this research were all students of X-1 SMA Laboratorium Undiksha Singaraja in the second semester of the Academic Year 2016/2017, which consists of 26 students. The data of students' mathematical problem solving ability were collected by using mathematical problem solving tests, while the data of students' mathematical problem solving activity were collected by using observation sheet which was completed with the findings during the learning process, and the data of students’ responses were collected by using semi open ended questionnaire and student comments. Furthermore, the data were analyzed descriptively described in the form of brief descriptions, percentages, diagrams, and physical proof. The results showed that the average score of students' mathematical problem solving ability in cycle III has met the success indicator that is equal to 77.85 which means to be in complete category. While the average score of students' mathematical problem solving activity in cycle III is 7.78 which means to be in active category. The average score of students’ responses is in the positive category. There are also findings about students already able to: (1) understand the problem, (2) planning to solve the problem, (3) solve the problem, and (4) ) Look back on the results obtainedkeyword : ARIAS, video, problem solving]]>
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