From Pennsylvania State University, with support from the Lilly Endowment and the John Templeton Foundation, the Associate of Religion Data Archives (ARDA; formerly known as the American Religion Data Archive) is an extensive online repository for data about religion around the world. Aimed at educators, researchers, journalists, and religious congregations, the ARDA features U.S. and international religious surveys and congregation membership data. One highlight of this website's data collection is the Congregational Resource Center; here, visitors can explore religious affiliation data alongside a number of indexes about religious freedom in that country. In addition to a wealth of data, the site boasts a number of teaching tools, including lesson plans and sample syllabi for religious studies and social science classrooms. Also of note are three interactive timelines that highlight the history of religion in the United States and a number of family trees, which trace the development of a number of religions over time.