Many US education reform efforts focus on student performance in large, urban school districts. The National Assessment of Educational Progress's Trial Urban District Assessment (TUDA) program provides data on student achievement in these districts, but differences in student characteristics complicate comparisons of district performance. I use student-level data to adjust TUDA scores for a rich set of demographic factors across districts and over time, allowing for more appropriate comparisons of achievement in TUDA districts. The results point to districts that have excelled or lagged in their levels of student achievement and the progress they have made over time.