This document analyzes the costs and benefits of an extended day kindergarten program in an affluent Pennsylvania school district. It finds that the total cost of the program is $37,000 per year but it saves the district over $137,000 by reducing special education placements and the need for reading recovery services. Test score data shows students in the extended day program consistently outperforming peers on vocabulary, spelling, and word recognition tests in later grades. The analysis concludes the program's benefits outweigh the costs.