This study confirms, yet again, that California's public charter schools continue to gain momentum in serving traditionally underserved communities and serving them significantly better, while enrolling a higher proportion of significant subgroups than traditional schools. (ccsa.org)
(I don't mean 1 guy in a group of 10s of thousands, i mean statistically significant subgrouping) (politics.stackexchange.com)
The remaining criteria require alternative measures that show increases in pupil academic achievement for all groups of pupils schoolwide and among significant subgroups. (ccsa.org)