The current study investigates the effects of a fact family fluency intervention on math facts fluency and quantitative reasoning. Sixty-three students in Grades 5-8 participated in the study, including 14 students receiving special education services and 15 students receiving additional support. The researchers employed a quasi-experimental, switching replications design that included three waves of assessment. The first group to receive intervention achieved statistically significant gains in performance on both math facts fluency and quantitative reasoning. The second group then received intervention and demonstrated a similar performance. Implications of the current findings and potential directions for future research are discussed.