The 2013 ratings are based on a revised system that uses various indicators to provide greater detail on the performance of a district or charter and each individual campus throughout the state. The performance index framework includes four areas:

• Student Achievement - Represents a snapshot of performance across all subjects, on both general and alternative assessments, at an established performance standard. 
  (All Students)
• Student Progress - Provides an opportunity for diverse campuses to show improvements made independent of overall achievement levels. Growth is evaluated by subject and student group.
  (All Students; Student Groups by Race/Ethnicity; English Language Learners; Special Education)
• Closing Performance Gaps - Emphasizes improving academic achievement of the economically disadvantaged student group and the lowest performing race/ethnicity student groups at each campus or district. 
  (All Economically Disadvantaged Students; Student Groups by Race/Ethnicity)
• Postsecondary Readiness - Includes measures of high school completion, and beginning in 2014, State of Texas Assessments of Academic Readiness (STAAR®) performance at the postsecondary readiness standard.
  (All Students; Student Groups by Race/Ethnicity; English Language Learners; Special Education)

Districts and campuses with students in Grade 9 or above must meet targets on all four indexes. Districts and campuses with students in Grade 8 or lower must meet targets on the first three indexes (excluding Postsecondary Readiness).