In low-performing, high-poverty schools with high teacher turnover, the focus often shifts from replacing ineffective teachers to retaining the most effective ones. Tennessee initiated a $5,000 retention bonus for top-rated teachers in the lowest-performing schools. Analyzing its impact, the program significantly increased retention of high-performing instructors in tested subjects, up by about 20%. These retained teachers outshined potential replacements, exhibiting a 1.64 standard deviation increase in effectiveness compared to likely new hires. Yet, this bonus had no significant effect on untested subject teachers, suggesting that one-time incentives might not offset systemic issues in the teacher evaluation system. Schools with disadvantaged students face a crucial need to retain effective teachers, as teacher concentrations in such settings often negatively affect working conditions. While retention bonuses show promise, other factors beyond monetary rewards influence teacher retention, calling for further exploration of working conditions, policy incentives, and compensation interactions. However, these targeted bonuses prove cost-effective and advantageous compared to turnover-related expenses, potentially offering significant benefits to students by retaining highly effective teachers.