School Effectiveness Indices are Dallas ISD's value-added measure of the academic performance of a school's students. The SEI model is an alternative to evaluating school performance with absolute measures such as passing rates. SEIs are a fairer method for determining a school's effect on student performance because they take into consideration known factors over which school personnel have no control, such as socio-economic status, language proficiency, and gender.
School reports (with graphs) contain grade- and content-specific components of the overall SEI (e.g., tests, AP enrollment, attendance, dropout, graduation). "Overall SEI" has an average of 50 and standard deviation of 5; the range for an "average" overall SEI is 45 to 55.