This study aimed to improve students’ mathematical literacy skills (MLS) through the implementation of the Problem-Based Learning (PBL) model in the topic of probability at Phase E. The subjects were Grade X.1 students of SMAN 7 Pekanbaru in the 2024/2025 academic year. This Classroom Action Research (CAR) was carried out in two cycles, namely Cycle I and Cycle II, each consisting of two meet…