Thurlow, MarthaHodgson, JenniferLarson, Sheryl2015-08-172015-08-172010-03https://hdl.handle.net/11299/173834A report updating information in previous National Center on Educational Outcomes (NCEO) reports that, since 2007, have annually compiled, analyzed, and summarized states' participation guidelines for the Alternate Assessments based on Modified Achievement Standards (AA-MAS). As of October 2009, 14 states had publicly-available participation guidelines for an assessment they considered to be an AA-MAS. Results from this study suggest that states are continuing to develop or update their participation guidelines.enK-12 educationdisabilityeducational accountabilityeducational assessmenteducational accommodationsReport