This school has closed, after more than eight decades on Avenue T. We keep the entry because listings still show it as open.
Windmill ran from 1941 to 2024 — one of the longest-running Montessori schools in the city, and a genuine one. There was no closure announcement; the state's records and the city's permit register are what establish it. If you have information that corrects this, please tell us.
Two independent lines of evidence, from different agencies:
One honest caveat on that second point. We cite the yeshiva only from the city's register. Its own website lists three campuses and Avenue T is not among them — so treat the successor-occupancy detail as a city record, not as something the yeshiva itself publishes. The closure finding does not depend on it.
Windmill's own archived website stated that it was “Affilliated with The American Montessori Society (AMS)” — their spelling — and separately described itself as an “Accredited Preschool, Elementary, Junior High School and Summer Day Camp” without naming any accreditor. Neither claim is supported: Windmill does not appear in the AMS register, and “affiliated” is not an AMS status in any case.
We note it not to criticise a school that no longer exists, but because it is a clean example of the pattern we track across this directory — a claim of accreditation with no body attached, which then gets copied into third-party listings as fact. See our accreditation check.
Operating Montessori options in southern Brooklyn are thin. In our directory, the nearest are Montessori Day School of Brooklyn in Prospect Heights, Lefferts Gardens Montessori, and Brooklyn Heights Montessori School — all a fair distance north. Browse the full directory.
Violations heard and decided at the city’s administrative tribunal. We publish these in full, including when there are none.
No cases on record. No summons to this school appears in the city’s hearing records.
For comparison: across all 18,161 DOHMH child-care cases heard at OATH, 63.1% were sustained, 21.3% ended in default and 13.1% were dismissed. Most citations concern records, repairs and paperwork — staff immunisation files, premises upkeep, sink water temperature, background-check timing — rather than incidents involving a child.
Source: NYC Office of Administrative Trials and Hearings, case status data, checked 11 August 2026. These are adjudicated outcomes, not inspection allegations. The record gives the rule cited and the result, but never the inspector’s narrative — the charge text always reads “see attached NOV”. Outcomes can change on appeal. Something wrong? Tell us.
A school that ran for eighty years leaves a lot of alumni. If you attended or taught here, we would like to record its history accurately.