This report summarizes activities of the National Center on Educational Outcomes directed at producing a report on the status of students with disabilities from the secondary analysis of state-collected achievement data. Although 27 states reported that large-scale achievement data were available for some students with disabilities, potentially usable data were obtained from only six states. The reasons that database files could not be obtained for 21 of the 27 states include: among others unreliable coding or no coding of students with disabilities in data file, aggregate and not individual data available, data file unreadable or appeared to contain errors, confidentiality concerns expressed by state, and excessive acquisition costs for data files. Analysis of achievement data from the six states revealed other problems, such as sparse data at individual grade levels, noncomparability of types of data, variable or no identification of student disability characteristics, and exclusion of large proportions of students with disabilities. It was concluded that it is currently not possible to produce a synthesis report on the achievement status of students with disabilities from aggregated state databases. Recommendations are presented for improving the probability of conducting such analyses in the future. (Contains 18 references.) (JDD)