Century Analytics, Inc. conducted a rigorous evaluation of Edmentum's Exact Path to estimate the impact of Exact Path use on student achievement in mathematics in kindergarten through Grade 8. Exact Path is an online educational tool designed to support individualized student instruction. This study's quasi-experimental design (QED), analyses, and measures meet the What Works Clearinghouse (WWC) 4.0 standards needed to achieve a rating of "Meets WWC Group Design Standards with Reservations" (WWC, 2017). This study also meets the Every Student Succeeds Act (ESSA) guidance for "Moderate Evidence" (U.S. Department of Education, 2016). Students in the Exact Path intervention group completed at least eight Exact Path lessons between the fall administration and the winter administration of the Exact Path diagnostic assessment. Students in the comparison group completed zero lessons between the two test administrations. Analyses revealed statistically significant positive impacts for student usage of Exact Path on mathematics achievement in kindergarten through Grade 8. Impacts had effects sizes ranging from 0.06 for Grade 3 to 0.40 for kindergarten and improvement indexes ranging from 2.39 to 15.54. Results of this study suggest that students who use Exact Path and complete at least eight lessons as assigned by Exact Path will make statistically significant gains in achievement relative to students who do not complete any Exact Path lessons. These results also suggest that Exact Path is targeting the skills that students need to develop in order to improve their mathematics achievement. [This report was prepared by Century Analytics.]