This data spreadsheet from the Connecticut State Department of Education, which spans from the 2011-12 school year to the 2023-24 school year, breaks down each Connecticut town's Education Cost Sharing (ECS) grant by the Alliance District and non-Alliance District portion.
Alliance Districts, which are 36 of the lowest-performing local public school districts in the state, receive increased ECS funding "to support district strategies to dramatically increase student outcomes and close achievement gaps."
According to Connecticut's General Statutes, each Alliance District’s increased funding is conditioned upon the submission — and approval by the commissioner the Connecticut State Department of Education — of a plan for improving district academic outcomes as well as district progress and performance relative to that plan.
Citation
Connecticut State Department of Education. (2023). Breakout of ECS Entitlements between Alliance and Non-Alliance. Hartford, CT: Author. Available from https://portal.ct.gov/SDE/Fiscal-Services/Education-Cost-Sharing-Grant-ECS-MBR/Documents.