Neither ESSA nor U.S. Department of Education (ED) Guidance includes a specific definition of “preschool.” To determine whether a particular early childhood education program is a “preschool” under ESSA, a helpful reference is the definition ED uses for McKinney-Vento data collection. Per the U.S. Department of Education’s data collection, specific examples of preschool programs that meet this definition include: Preschool programs operated or administered by an LEA; Head Start programs receiving funding from an LEA or for which an LEA receives the grant; Preschool special education services operated or funded by the LEA or mandated under the Individuals with Disabilities Education Act; Preschool programs and services administered or funded by the LEA through the use of Title I or similar government grants; and Home-based early childhood educational services funded and administered by an LEA. This flow chart provides a guide to understanding that definition. The document also helps explain the concept of “feeder schools” as they apply to preschool programs under ESSA’s amendments to the McKinney-Vento Act. (author abstract)