A study that examines: the characteristics of dual language learner Head Start and Early Head Start children and their families; the services they receive; the qualifications of staff that serve them; the languages that staff use to communicate with them; and dual language learner children's developmental progress, based on Head Start Program Information Report data, Head Start Family and Child Experiences Survey 2006 (FACES 2006) data, and Early Head Start Family and Child Experiences Survey (Baby FACES) data