Penelitian ini bertujuan untuk meningkatkan kemampuan pemecahan masalah matematika dan self-efficacy siswa dalam menyelesaikan soal cerita matematika kelas IX-9 SMP Negeri 4 Tarakan dengan menerapkan metode Preview, Question, Rewrite, Solve, Test (PQRST).
Subjek penelitian ini adalah siswa kelas IX-9 SMP Negeri 4 Tarakan, yaitu 32 siswa. Teknik pengumpulan data dalam penelitian ini menggunakan instrumen tes kemampuan pemecahan masalah matematika siswa, lembar observasi keterlaksanaan kegiatan pembelajaran, dan angket self-efficacy. Teknik analisis data yang digunakan dalam penelitian ini yaitu data tes kemampuan pemecahan masalah matematika, data hasil lembar observasi keterlaksanaan kegiatan pembelajaran, dan angket self-efficacy siswa. Penelitian ini dilaksanakan dalam 2 siklus, yang terdiri atas 3 pertemuan pada setiap siklus.
Hasil penelitian ini menunjukkan bahwa kemampuan pemecahan masalah matematika siswa pada siklus I sebesar 75% siswa mencapai nilai KKM dan siklus II mengalami peningkatan menjadi 87,5% siswa tuntas dengan indikator keberhasilan minimal 70% siswa kelas IX-9 SMP Negeri 4 Tarakan mencapai KKM mata pelajaran Matematika yang telah ditetapkan oleh sekolah, yaitu 75. Sedangkan self-efficacy siswa pada siklus I sebesar 65,63% siswa berada pada kategori minimal tinggi dan siklus II mengalami peningkatan menjadi 84,38% dengan indikator keberhasilan 70% siswa berada pada kategori minimal tinggi. Berdasarkan hasil penelitian di atas, maka dapat disimpulkan bahwa penerapan metode Preview, Question, Rewrite, Solve, Test (PQRST) dapat meningkatkan kemampuan pemecahan masalah matematika dan self-efficacy siswa dalam menyelesaikan soal cerita matematika kelas IX-9 SMP Negeri 4 Tarakan.

Kata Kunci: Kemampuan Pemecahan Masalah Matematika, Self-Efficacy, Metode Preview, Question, Rewrite, Solve, Test (PQRST)

This study aims to improve mathematical problem solving skills and selfefficacy of students in solving mathematical story problems of class IX-9 of SMP Negeri 4 Tarakan by applying the methods of Preview, Question, Rewrite, Solve, Test (PQRST). This type of research is classroom action research. The subjects of this study were students of class IX-9 of SMP Negeri 4 Tarakan, namely 32 students. The data collection technique in this study used students' mathematical problem solving ability test instruments, learning activities implementation observation sheets, and self-efficacy questionnaires. The data analysis technique used in this study is test data on mathematical problem solving abilities, data on the results of observation sheets for learning activities, and student self-efficacy questionnaires. This research was conducted in 2 cycles, consisting of 3 meetings in each cycle. The results of this study indicate that students' mathematical problem solving abilities in the first cycle amounted to 75% of students reached the KKM value and the second cycle increased to 87.5% of students completed with indicators of success of at least 70% students of class IX-9 of SMP Negeri 4 Tarakan reached KKM mathematics subjects set by school, which is 75. While the self-efficacy of students in the first cycle of 65.63% of students are in the high minimum category and the second cycle has increased to 84.38% with an indicator of success 70% of students are in the high minimum category. Based on the results of the above research, it can be concluded that the application of the Preview, Question, Rewrite, Solve, Test (PQRST) method can improve mathematical problem solving skills and students' self-efficacy in solving mathematical problem questions in class IX-9 of SMP Negeri 4 Tarakan. Keywords: Mathematical Problem Solving Ability, Self-Efficacy, Method of Preview, Question, Rewrite, Solve, Test (PQRST)