It is critical that teachers and administrators seek out and serve the invisible children in their classrooms and schools. When they acknowledge the condition of homeless and foster children, they can begin to address their unique learning needs and close their learning gaps. Based on definitions provided by the McKinney-Vento Act, some schools were unaware they had homeless children enrolled in their schools. They discovered that ten percent of their students would be considered homeless. This article challenges educators to be knowledgeable about homeless and foster children and their unique learning needs.