Enacted in 2014, the Workforce Innovation and Opportunity Act (WIOA) brought numerous changes to existing federal employment and training programs, including requiring the Department of Labor (DOL) and the Department of Education (Education) to implement a common performance accountability system across the six WIOA-designated core programs. WIOA includes a provision for the Government Accountability Office (GAO) to issue an interim and final report on issues related to job training databases and data exchange agreements. This final report addresses: (1) changes selected states plan to make in how they collect and report performance information for core programs; (2) challenges these states face related to performance reporting and how they might be addressed; and (3) whether these states have reported breaches to core program data systems and what practices they have to safeguard personal information. GAO reviewed relevant federal laws, regulations, and policy guidance; and obtained information on the efforts under way in three states (Illinois, New Hampshire, and Texas) selected in part based on variation in level of experience with sharing data across programs. The views of these officials provide in-depth examples but are not generalizable to all states. GAO also interviewed DOL and Education officials, including selected DOL regional officials and Education state liaisons and area coordinators to obtain perspectives on more states. GAO makes no recommendations in this report. In its comments on a draft of this report, DOL highlighted its efforts with Education to promote a unified vision of performance accountability. Appended are: (1) Comments from the U.S. Department of Labor; and (2) GAO Contact and Staff Acknowledgments.