The Individuals with Disabilities Education Improvement Act National Assessment Implementation Study (IDEA-NAIS) is a congressionally mandated study that provides a national picture of state agency implementation of early intervention programs for infants and toddlers (IDEA Part C) and both state and school district implementation of special education programs for preschool- and school-age children (IDEA Part B). The study is based on surveys of state agency directors and a nationally representative sample of district special education directors conducted in 2009. The restricted use files include data from these surveys and relevant extant data from state websites, National Vital Statistics System (NVSS), the Data Accountability Center (DAC), the Common Core of Data (CCD), the Center for Appropriate Dispute Resolution in Special Education (CADRE), and the ETS Praxis website.
