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Penelitian ini adalah penelitian tindakan kelas yang bertujuan untuk memperbaiki proses pembelajaran dan meningkatkan kemampuan pemecahan masalah matematis siswa melalui penerapan model Pembelajaran Berdasarkan Masalah. Subjek pada penelitian ini adalah siswa kelas  SMP PGRI Pekanbaru pada semester genap tahun pelajaran 2019/2020, yang berjumlah 28 orang. Penelitian ini terdiri dari dua siklus, yang setiap siklus terdiri dari empat tahap berupa perencanaan, pelaksanaan, pengamatan dan refleksi. Instrumen penelitian yang digunakan adalah perangkat pembelajaran dan instrumen pengumpulan data. Perangkat pembelajaran terdiri dari silabus, Rencana Pelaksanaan Pembelajaran (RPP), dan Lembar Aktivitas Siswa (LAS), sedangkan instrumen pengumpulan data yang digunakan adalah lembar pengamatan dan tes KPMM. Data dari lembar pengamatan dan data dari tes kemampuan pemecahan masalah matematis dianalisis dengan teknik analisis statistik deskriptif. Data dari lembar observasi  menunjukkan bahwa proses pembelajaran mengalami perbaikan dari siklus I ke siklus II. Rata-rata nilai KPMM siswa pada siklus I sebesar 66.78 meningkat menjadi 84.64 pada siklus II. Berdasarkan hasil yang diperoleh, maka dapat disimpulkan bahwa model Pembelajaran Berdasarkan Masalah dapat memperbaiki proses pembelajaran dan meningkatkan kemampuan pemecahan masalah matematis siswa kelas  SMP PGRI Pekanbaru pada semester genap tahun pelajaran 2019/2020.

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Problem-based learning is a learning model that uses real-life problems that require authentic investigations to construct knowledge actively and collaboratively. The aim of this study was to capture the research landscape related to problem-based learning applied to students at the middle school level from 1998 to 2023. A descriptive bibliometric analysis method was used in this study. The data obtained was taken from the Scopus database. The results of the study show that publications related to problem-based learning, especially in middle schools, go up and down every year. Publications in 2003 have been cited more than any other year. The United States of America is the most influential country in this field. publications in journals related to problem-based learning research applied to middle school students are mostly at the Q1 rank, namely 45 journals. The research focus is divided into 3 namely, 1) knowledge, skills and development; 2) effect, self-efficacy, achievement and effectiveness; 3) middle school students, environment and abilities. These three research focuses can be used as a reference for future researchers to determine the focus of their research related to problem-based learning

One of the factors that influence the ability to solve mathematical problems is that students do not like mathematics and lack the ability to understand concepts. The purpose of this study was to analyze the effect of math anxiety on students' mathematical problem solving abilities. This research uses SLR (Systematic Literature Review). The result of this study is that the effect of math anxiety on problem solving abilities is negative. Based on the studies reviewed, it can be concluded that the level of students' math anxiety is high, so the resulting problem-solving ability is low, and vice versa. Problem solving abilities are strongly influenced by students' math anxiety.