The Head Start REACH: Strengthening Outreach, Recruitment, and Engagement Approaches with Families project is focused on understanding the eligibility, recruitment, selection, enrollment, and attendance/retention (ERSEA) approaches that Head Start programs use to engage Head Start--eligible families experiencing adversities. One of the foundational activities of the project was to conduct case studies to obtain an in-depth understanding of the ERSEA approaches that are being used with families experiencing adversities; the factors that affect their implementation; and how families find and experience early education and child care, including those who are and are not enrolled in Head Start. Six urban and rural Head Start programs of varying sizes from six Administration for Children and Families (ACF) regions were part of the Head Start REACH case studies. From February to April 2022, the study team collected data from (1) Head Start program staff, (2) families who participate in their programs, (3) organizations the programs partner with to work on eligibility, recruitment, selection, enrollment, and attendance/retention (ERSEA), and (4) Head Start-eligible families who were not currently enrolled. This brief summarizes findings from these case studies. hods section at the end of this brief details the sampling, data collection, and analysis methods.