Head Start provide an intensive combination of education, health and nutrition screening and assistance, parent involvement and family support. Three- and four-year-olds attend high-quality pre-school classes, are screened and immunize for possible health problems that could hinder learning. Family needs are assessed so that families can be referred to community resources, and adults are provided with training to improve their parenting, leadership, and self-sufficiency skills. These programs have been successful in preparing children for school, identifying and addressing health and nutrition issues, and helping parents with parenting, leadership and self-sufficiency skills. Parents are involved both in the classroom and through local parent-run policy councils. Head Start serves prenatal to 5 years in age as the community's free preschool program.