Mathematical fact fluency, particularly in addition and subtraction, is crucial for students' success in later mathematical concepts and is often a focus of elementary education. Educators are exploring tools to enhance math fluency, such as Reflex Math, a digital program designed to accelerate students' fact fluency through adaptive learning methods. This study investigated the impact of Reflex Math on third-grade students' addition and subtraction fact fluency and its potential correlation with performance on the Pennsylvania System of School Assessment (PSSA) Mathematics test. The research employed a quantitative, quasi-experimental design, involving 55 third-grade students who used Reflex Math during the 2022-2023 school year. Data were collected from Reflex Math usage reports and PSSA Mathematics scores. The analysis revealed that addition and subtraction fact fluency was statistically significant and that Reflex Math positively impacted students over the 2022-2023 school year. The study found weak correlations between PSSA Mathematics scores and fact fluency, suggesting that fact fluency may not be a reliable indicator of performance on PSSA standardized exams. Further research is needed to explore the long-term effects of Reflex Math on broader mathematical concepts and to consider incorporating Reflex Math as a supplementary tool to enhance students' foundational math skills and improve overall academic performance.