This document seeks to provide a broad overview of the contemporary trends and existing research related to young children experiencing homelessness in the United States. Conducted by Johns Hopkins University's Center for Research and Reform in Education in conjunction with the Johns Hopkins IDEALS Institute, this research was conducted for purposes of providing early education practitioners with key information concerning the definitions, demographic trends, and contemporary issues that inform the broader societal discussion concerning childhood homelessness. As importantly, this document also provides an overview of the existing research on both the impacts of homelessness on educational outcomes for young children, as well as the key strategies and programs that appear most promising for mitigating these impacts. This research was conducted as part of technical assistance under the Maryland Rebuilds Workforce Grant and is part of a broader project led by JHU IDEALS supporting the advancement of early childcare and education professionals. As such, the research presented throughout this document places special emphasis on that germane to children five years and younger, as well as programs and demographic trends with homelessness specific to the state of Maryland. For organizational purposes, this document is framed as a series of questions and answers as it relates to common topics concerning childhood homelessness and aims to serve as an informational reference for early childhood educators and resource providers. These orienting questions include the following, which are presented and addressed throughout the subsequent sections of this document: (1) How is childhood homelessness defined?; (2) How prevalent is childhood homelessness?; (3) How can experiencing homelessness impact the learning and development of young children?; (4) What programs are employed on a national and/or state level that are aimed at serving children experiencing homelessness?; and (5) What are "best practices" that should be considered in serving young children experiencing homelessness?