Head Start programs engage parents to support children's growth from birth through age 5 through services that promote early learning and development, health, and family well-being. These programs specifically seek to assist families with low incomes and families facing a variety of other adversities. 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. In this brief, the authors detail how programs develop and implement their criteria and processes for selecting families for enrollment. Selection refers to the procedures a program follows to assess their community's needs, update their selection criteria, and use those criteria to assign points to submitted applications. The authors highlight how programs use their selection processes to identify and select families with the greatest need. They also summarize approaches that programs perceive as successful and those that reflect opportunities for growth. The Methods section at the end of this brief details the sampling, data collection, and analysis methods.