Even with current evidence-based preschool programming efforts for children from high-risk backgrounds, many children vary in their skill levels at school entry. The authors examined the influence of using an evidence-based literacy curriculum during a 6-week summer program. The authors documented improvements in children's letter-naming, picture-naming, and rhyming skills when compared with a nonparticipating control group. Differences between the treatment and control groups were not as strong for the children's alliteration skills. These positive results suggest that a 6-week summer prevention program could increase the likelihood that children from high-risk backgrounds will have a positive beginning school experience. (Contains 1 figure and 3 tables.)