When we audited every accreditation label in our own directory against the live register, we were wrong in nine places. Here's how it happens to everyone — and the three-minute check that settles it.
Published August 18, 2026
Start with a confession: when we audited every accreditation label in our own directory against the American Montessori Society's live register this August, we were wrong in nine places.
We had labelled six schools "AMS member" that the register does not currently support. We had under-credited three others — calling them plain members when they are among the only AMS-Verified schools in the five boroughs. If a directory that does this for a living can drift nine labels away from the source of truth, the listing sites that copy each other can do far worse. And they do.
This article explains how it happens — not through lying, mostly, but through a chain of small, almost innocent transformations — and how you can check any school yourself in about three minutes.
The American Montessori Society recognises exactly four relationships with a school, and their register spells them (including AMS's own typo) as: ACCREDITATED, VERIFIED, MEMBERSHIP, and ACCREDITATION_CANDIDATE. Accreditation is a multi-year review of the whole school. Verified means AMS has confirmed core Montessori elements — trained teachers in every classroom. Membership is, at bottom, a subscription: real, meaningful as a signal of engagement, renewed annually, and not a quality review.
Words you will meet on school websites that are not on that list: affiliate, associated with, initiate member, founding member. When a school reaches for a word AMS doesn't use, that's not proof of anything bad. It is a reason to look up the register entry yourself.
As of our August 2026 enumeration, the entire five boroughs hold 20 AMS school records: 5 accredited, 3 verified, 12 members. That's the whole universe. Any Montessori school in New York City claiming an AMS relationship is claiming to be one of twenty — which makes the claim easy to check, and easy to get wrong.
Our case file, built from real NYC listings this summer, sorts every instance we found into five mechanisms. Where we found a claim the register doesn't support, our standing rule applies — we say we could not verify a current membership. We never say a school "falsely claims." There is an honest explanation for most of these, and we'll get to it.
1. The institutional claim, in words AMS doesn't use. A school says it is "affiliated with" or "an affiliate of" the American Montessori Society. "Affiliate" is not a tier. Sometimes the claim is even in the future tense — one school's site promises it "will obtain accreditation" from one body while being "associated with" another. Neither phrase is a status.
2. The teacher-credential drift. This is the mechanism the headline is about, and it deserves its name: a school truthfully writes that its teachers hold AMS certification. An aggregator's data entry form has a field called "School Assoc." Somewhere between the sentence and the field, the teachers' credential becomes the school's membership. We found one listing page that captures the entire transformation in a single screenshot: the narrative text says each teacher holds an AMS teaching certificate — the structured field above it says "School Assoc.: American Montessori Society (AMS)." A credential held by people became an accreditation held by an institution, and no one ever decided to claim it.
3. The training lineage. A named educator trained at a respected Montessori teacher-education program; listings inherit the program's name as if it were the school's badge.
4. Pure aggregator invention. One school in our directory says nothing at all — we fetched all 82 pages of its website and found zero occurrences of "AMS," "AMI," "accredit," or "affiliat." A major listing site nonetheless carries "School Assoc.: AMS" for it, marked "Verified school update." The claim exists nowhere the school controls.
5. The inverse. It cuts the other way too: one Queens school is a current, paid AMS member — and its own website never mentions Montessori at all. The register says yes; the school itself has moved on. Both can be true at once, which is why we check both directions.
Here's the mechanism that explains most of our own nine errors, and it's fairer to the schools than you'd guess. Four of the schools whose AMS labels we couldn't verify have something in common: dead amshq.org/schools/… profile URLs. The pages return 404 — but they still rank in search results, still anchor aggregator listings, and still look like proof to anyone who doesn't click.
A dead AMS permalink means a record was removed. It does not say when, or why. AMS membership runs on a July-to-June year with no proration and no published lapse notices — so some of these are probably nothing more than renewal churn caught mid-cycle. That is why "lapsed" and "fabricated" must never be written as if they were the same thing, and why our own corrected labels say what the register showed on a dated check rather than passing a verdict.
One more wrinkle from our audit: a fetched AMS profile page can render even when it is actually a 404 — and name lookalikes are real. There is a "Rose Hill Montessori" in the AMS register; it is in Boise, Idaho. A name-only check would hand a Manhattan school an Idaho school's membership. Always confirm the address on the register entry, not just the name.
1. Search the AMS register at amshq.org/schools for the school's name — then confirm the address on the record matches the school you mean. Note the pathway word: Accredited, Verified, Member, or Candidate.
2. If a link to an AMS profile is dead, treat the claim as unverified, not disproven — and ask the school. "When did your AMS membership last renew?" is a fair, specific question any office can answer.
3. Check AMI separately at amiusa.org's school locator — the entire New York list is four schools, so this takes thirty seconds. AMI's tiers (Recognized, Associated, Affiliated) are scoped by age range; a tier "for ages 0–3" tells you nothing about the elementary program.
4. Translate teacher claims correctly. "Our teachers are AMS/AMI-trained" is a claim about people, and often a true and important one — MACTE-accredited training is the real signal of teacher preparation. It is not a school accreditation, and any listing that converts one into the other has made the error in mechanism #2.
5. Never rely on listing sites for this field — in our file, the same aggregator page that invented one school's AMS association also gave a Brooklyn school a Virginia area code.
Our own verification flags, school by school and dated, are on the accreditation check page, and the definitions we rate against are on what makes a Montessori school authentic. Where we corrected our own labels, the profile says so — same standard we hold everyone else to.
Accreditation is one signal, not a verdict. Twelve of New York's twenty AMS records are memberships — subscriptions, honestly held, that say a school wants to be part of the Montessori community. Only eight schools in the whole city have passed an external review of any depth. Plenty of good schools hold no badge at all, and say so plainly — and a school that tells you "we're not accredited, here's what we do instead" is showing you the exact transparency this site exists to reward. The red flag isn't the absence of a credential. It's a credential that dissolves when you look it up.