Minnesota Reading Corps is the largest AmeriCorps State program in the country. Its mission is to help every Minnesota child become a proficient reader by the end of third grade. To meet this goal, the Minnesota Reading Corps and its host organization, ServeMinnesota Action Network, engages a diverse group of AmeriCorps members to provide evidence-based literacy enrichment and tutoring services to preschool (PreK) students and at-risk Kindergarten through third grade (K-3) elementary school students. This report, commissioned by the Corporation for National and Community Service (CNCS), describes the results of a quasi-experimental design (QED) outcome evaluation of 1,534, 3-, 4-, and 5-year old PreK students who attended either a Minnesota Reading Corps PreK program site or a comparison site during the 2013-2014 school year. Students were enrolled at 25 Minnesota Reading Corps PreK sites and 25 comparison PreK sites matched to each Minnesota Reading Corp on specific site-level characteristics. The goal of the outcome evaluation was to determine the effects of the Minnesota Reading Corps program on PreK students' emergent literacy skills. Key findings from the study included: (1) PreK students in the Minnesota Reading Corps program achieved significantly higher emergent literacy assessment scores by the end of the school year than did students enrolled at matched-comparison sites; (2) The Minnesota Reading Corps PreK program was equally effective for PreK students regardless of gender, race/ethnicity or Dual Language Learner (DLL) status; and (3) The Minnesota Reading Corps PreK program was effective across multiple sites and site types; thus, the program is highly replicable in multiple preschool settings. [See: Issue Brief at ED560023 and Appendices at ED560025.]