Over the last decade the 21st Century Community Learning Center program (21st CCLC) funded by the U.S. Department of Education has served over 100,000 Texas students annually in after-school centers. Approximately 779 local Texas 21st CCLC programs served students from over 800 schools during the 2012-13, and/or 2013-14 academic years. Statewide evaluations of the impact of 21st CCLCs, which typically show small or mixed academic impacts of the program in aggregate, may serve to obscure the success of specific centers. To explore this, Westat examined individual grade-level impacts for the 779 local programs which served students during the 2012-13 and/or 2013-14 academic years. Propensity-score matching was used to create comparison groups of non-21st CCLC students for each grade-level, for each of the centers, for each of three outcomes: "school attendance," "STAAR Mathematics," and "STAAR Reading." For brevity this policy brief presents only impacts for the 2012-13 academic year, but these are similar in pattern to those identified in the 2013-14 analyses also conducted. The quasi-experimental design (QED) used in this study allowed for large-scale screening of centers based on existing administrative data. The approach identified a number of potentially effective centers, whose programmatic offerings could be more closely investigated.