Ensuring that all children arrive to kindergarten 'ready to learn' is one of the most pressing issues in early childhood policy and practice. Children from low-income backgrounds are at particular risk for having poorer literacy and social skills upon kindergarten entry (Hair, Halle, Terry-Humen, Lavelle, & Calkins, 2006). Thus, there is a great need to develop and test comprehensive kindergarten readiness programs that target a broad range of skills, including foundational academic skills, social-emotional competencies, physical health, and creative skills, in order to reduce disparities in school readiness. This paper presents preliminary data on the feasibility and effectiveness of Summer Success, a community-based four-week program developed to provide rich instructional programming to children prior to their transition to kindergarten. (author abstract)