School finance adequacy litigation has become a widely-used means in the efforts to improve educational outcomes for children. This form of litigation has been attempted in nearly every state over the past two decades. Despite its prevalence, its effectiveness remains questionable due to a lack of study relating finance litigation to student outcomes. This article discusses the results of a study of the relationship between adequacy litigation and student achievement using data from the Early Childhood Longitudinal Study, Kindergarten Cohort. Linear regression analysis revealed that adequacy litigation, particularly when the plaintiffs prevail, has a positive relationship with achievement test scores of students from very low SES backgrounds, though the effect size is small. These results are similar, but not identical, to previous research on the topic. The results suggest that adequacy litigation can be an effective part of a comprehensive school-reform strategy, but that such litigation is highly unlikely to lead to major improvements in student achievement by itself. (Contains 3 figures, 4 tables, and 1 footnote.)