Overview: Through a range of participatory approaches, TIER works to meaningfully engage families, staff, and other interested parties in our evaluation designs, data collection strategies, interpretation of findings, and reporting. The participatory method and approach varies based on the project goals and questions, and has included: hiring, training, and mentoring community members with lived experience relevant to project topics to work as Community Evaluators who design studies, collect and analyze data, and translate data into meaningful policy and recommendations; convening evaluation working groups and advisory committees to inform evaluation questions, protocols, and the interpretation of findings; and facilitating action-oriented learning communities with providers from a range of program contexts to identify key issues and solutions.