To promote academic excellence in our high schools, we created the Excellence Index (EI): a simple way of rating schools academically by focusing exclusively on high achievement. The EI quantifies the percentage of students scoring at the highest levels on an array of exams. Scores are referenced to state and global norms, which are set to a EI score of 75 (representing a typical level of high achievement). To get a 75 score based on 2017 test score data a school would have:
– 29% score 6 or 7 on IB exams (if applicable)
These are each weighted equally in the index.
Chapel High School’s 2018 Excellence Index score is a 31. This means that Chapel Hill students are about 2.5 times LESS likely (31:75) to score at the highest levels on exams than their peers statewide or nationally. The underlying data is in the graph below.
Of note is the fact that in spite of having an AP magnet program, very few students are scoring at the highest level on AP exams. We believe this is largely as result of recruiting academically unqualified/unprepared students into AP courses, which allows them to offer more courses, which they market to attract students to their magnet program.
Positively, the percentage of students scoring on the EOC increased from 6.3 to 8.7. More students scored at the top level than the Georgia norm in Economics, US History, 9th Grade Lit, and American Lit. As a result of these gains, the EI score increased from 19 the previous year to 31.