In an increasingly data-driven world, data literacy - the ability to understand data and use it effectively - can generate significant improvements in national development outcomes. The World Bank's Data Use and Literacy (DUAL) Program works on increasing data accessibility and building capacity for data use, with a focus on developing data skills and empowering stakeholders at the global, regional, national, and local levels to leverage data more effectively. This report comprises and synthesizes three case studies, including on DUAL's data literacy training programs in Nepal and the Philippines, as well as work by a partner organization, the East-West Management Institute (EWMI), to roll out and adapt the program for 10 countries in the Mekong Region. Participants from each of the countries have gone on to train others in their organizations and incorporate data into their work in diverse ways. The case studies summarize the objectives, implementation, and results of each of these efforts, and aim to document lessons learned.