The idea that validity should be considered a property of inferences, rather than of assessments, has developed slowly over the past century. In early writings about the validity of educational assessments, validity was defined as a property of an assessment. The most common definition was that an assessment was valid to the extent that it…

This report summarizes 48 states' current policies on the participation of students with disabilities in large-scale assessments and the accommodations noted in state policies as available for those students. In developing the summary, changes in state assessment policies were also checked. Charts in the report provide information on presentation…