Data collected by the Massachusetts Department of Education (Department) during the 2005 Youth Risk Behavior Survey (YRBS) suggest that, despite significant efforts to identify homeless students, many are going undetected by their schools. Since the reauthorization of the McKinney Vento Homeless Assistance Education Improvement Act under the No Child Left Behind Act of 2001, the Office for the Education of Homeless Children and Youth and service providers for homeless children and families have been interested in knowing how many students in the Commonwealth are homeless. In the 2005 YRBS, the Department included a housing question for the first time. The YRBS not only provides an estimate of how many homeless students the schools can expect to educate but also sheds some light on the life experiences of those students. These youth move frequently, attend multiple schools, are often out of school for extended periods--resulting in wide educational gaps. Their ties to communities and extended families are disrupted, and relationships with peers and adults are broken. The YRBS data cannot determine whether risk behaviors or limited access to protective factors are the cause or consequence of homeless, but they do shine a spotlight on the struggles of many homeless students trying to access and succeed in school. (Contains 13 resources.)