Variation in Class Size Compliance by School Characteristics May Complicate NYC’s Landmark Investment

This Robin Hood-funded report from the Urban Institute report finds that New York City’s class size mandate is not delivering benefits equitably. Because high-poverty schools serving predominantly Black and Hispanic students already operate with smaller classes, they are more likely to already meet the state’s caps — meaning the mandate’s most significant reductions, and the new resources that come with them, are flowing disproportionately to schools serving wealthier, whiter populations.

New York State’s 2022 law requires city schools to cap classes at 20–25 students by 2027–28. The city has met early compliance benchmarks but faces steep hurdles ahead, with full implementation projected to cost billions annually and require thousands of additional teachers.

The report also warns that the hiring surge needed for compliance may intensify competition for educators, with lower-poverty schools better positioned to attract talent away from already hard-to-staff, high-need schools. To ensure smaller classes translate into better outcomes for students most affected by poverty, policymakers must pair compliance efforts with equitable funding formulas, enrollment adjustments, and targeted staffing supports for the schools that need them most.