A study of the relationships between preschooler school readiness skills and duration of Head Start attendance, income-to-needs ratio, financial strain, maternal health problems, and levels of neighborhood danger, as well as a study of duration of Head Start attendance as a moderator of the association between socio-contextual risk exposure and the attainment of school readiness skills by preschoolers, based on questionnaire responses of 167 mothers, their Head Start eligible children, and one 2-year-old from 12 centers in post Hurricane Katrina New Orleans, as well as crime reports and children's readiness scores