The Jumpstart program is a national early childhood education program focusing on supporting children's language skills, literacy, and social-emotional development. The present study examined the impact of Jumpstart programming on the school readiness of low-income preschool children. One hundred and twenty-one preschool children (69 boys, 52 girls) between three and five years old participated in the study. Assessments of student language skills, literacy, and social-emotional development were conducted using the Jumpstart School Success Checklist. Analysis of pre- and post-program student outcomes found that children in Jumpstart improved significantly in their language skills, literacy, initiative, and social development, t(117) = 37.63, p < 0.001. Results support the efficacy of Jumpstart in promoting student academic and socioemotional growth, highlighting the importance of such early childhood initiatives and pointing towards the potential of similar educational programs--particularly in supporting children from underserved communities. Limitations and future directions for this study were discussed.