PS 133 has a 77-point Black-white achievement gap inside one school

Thesis

At PS 133 William A. Butler in Brooklyn, white students score 89% proficient on grade-5 math; Black students score 12%. Ten schools have within-school Black-white gaps of 60+ points — overwhelmingly in gentrifying Manhattan and Brooklyn neighborhoods. This is segregation inside integration.

Supporting findings

• Top 10 within-school Black-white grade-5 math gaps (2024-25, NYC):
• PS 133 W. A. Butler (Brooklyn) — 77.1 pts (Black 12%, White 89%)
• PS 111 Adolph S. Ochs (Manhattan) — 75.7 pts (Black 14%, White 90%)
• PS 38 The Pacific (Brooklyn) — 75 pts (Black 25%, White 100%)
• PS 33 Chelsea Prep (Manhattan) — 74.7 pts
• PS 84 Lillian Weber (Manhattan) — 71.4 pts
• All of these are 'good' schools by aggregate metrics — they appear well above citywide averages because their white populations score near ceiling.
• These are also gentrifying neighborhood schools: PS 133 is in Park Slope, PS 38 is in Boerum Hill, PS 84 is in Upper West Side. Black families enroll alongside white families but classroom outcomes diverge.
• Within-school gaps may reflect program tracking (G&T vs gen-ed), enrichment access, or peer-network effects.
• Compare with similar gentrifying schools in other cities (DC, San Francisco, Oakland) for shape pattern.
• Cross-reference with G&T programs — schools with G&T tracks typically have larger within-school race gaps.

Reporting directions

• Pull PS 133's G&T enrollment vs gen-ed by race (FERPA-protected so likely aggregated — InsideSchools may have it).
• Interview principals at PS 133, PS 111, PS 84 about what they're seeing.
• Ana Cervantes / Rebecca Hsu reporting at Chalkbeat has covered this — credit + extend.
• Map gap by ZIP code — is this fully a Park Slope / UWS pattern or city-wide?