Chicago school percentile ranking on reading ‘value-added’ score, traditional public vs. charter, by school subgroup, 2012
Note: In high-poverty schools, the share of students eligible for free or reduced-price lunch is higher than the district average of 85 percent. The "value-added" score measures reading test score growth but with an attempt to control for demographic factors and prior achievement. Rankings show in which percentile school subgroups fall in the distribution of scores across all CPS elementary schools.
Source: Caref et al. (2012, 21)