The State Preschool Accountability Research Collaborative (SPARC) in collaboration with the Division of Early Childhood of the Council for Exceptional Children conducted a national study that involved four major research activities. First a comprehensive review of the literature was conducted to determine accountability practices and guidelines and supporting research. Second, a survey of the 50 states was conducted to identify how states were approaching preschool accountability. Third, a series of national focus group sessions were held to determine the perceptions of early childhood professionals about the inclusion of preschool populations in state accountability systems. Fourth, using information gathered from the first three activities, practices and guidelines were identified and a national validation survey conducted to determine the extent that early childhood professionals and families agreed with these practices and guidelines. The following summary provides information on the fourth and final activity of the project, the validation survey. Specific information about the methods, participants and results from this national survey are presented in this report. (author abstract)