The Florida 21st Century Community Learning Centers (21st CCLC) initiative is administered by the Florida Department of Education (FDOE). The Children's Forum was awarded a grant by FDOE to provide professional development, monitoring, and evaluation technical assistance to 21st CCLC grantees. The purpose of the 21st CCLC program is to provide at-risk and disadvantaged students from low-performing schools academic and personal enrichment opportunities that will complement their regular school-day activities. To accomplish this purpose, 21st CCLC sub-grantees must provide a range of high-quality, diverse services that support student learning and development. For the 2012-2013 grant period, 138 programs across Florida were awarded funding to operate a 21st CCLC program. Approximately 11% of programs were in their fifth and final year of funding, while 18% were new sub-grantees. Program organizational types included school districts, community-based organizations, faith-based organizations, colleges and universities, and city or county governmental entities. This Statewide Summative Evaluation Report examines the characteristics and impacts of the 21st CCLC initiative during the 2012-2013 grant period via eight study objective areas: 1. Programmatic characteristics of sub-grantees; 2. Demographic characteristics of students served; 3. Sub-grantee operations, staffing, partner collaborations, and achievement of program objectives; 4. Student reading and mathematics outcomes; 5. Student academic and socio-emotional performance with other select states; 6. Stakeholders' perceptions of program effectiveness; 7. Case studies of programs evidencing exemplary practices; and 8. Recommendations for future 21st CCLC implementation and administration. (author abstract)