<![CDATA[This study aimed to improve the mathematics learning outcomes of third-grade students at SD Negeri Bertingkat Naikoten through the implementation of the Problem-Based Learning (PBL) model assisted by Quizizz. The research was motivated by low student achievement in mathematics, particularly in the topic of dividing whole numbers up to 100, due to conventional teaching methods that lacked student engagement. The study employed Classroom Action Research (CAR) with two cycles, each consisting of planning, action, observation, and reflection stages. Data were collected through observation sheets and tests, then analyzed descriptively. Results showed a significant improvement: the average student score increased from 50.37 in the pre-cycle to 62.59 in Cycle I and further to 81.11 in Cycle II. Similarly, the percentage of students achieving the mastery criteria rose from 18.52% (pre-cycle) to 40.74% (Cycle I) and 92.59% (Cycle II). The findings indicate that the PBL model combined with Quizizz effectively enhanced student engagement and learning outcomes by making the process interactive and enjoyable. This approach not only improved mathematical understanding but also fostered critical thinking and collaboration skills. The study concludes that integrating technology like Quizizz with PBL can be a viable strategy to address learning challenges in elementary mathematics]]>
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