Accreditation check

This page is not an accusation. “Montessori” is not a trademark, memberships renew every year, and a school can be excellent whether or not a directory currently lists it. Our job as an independent guide is simply to show you where a school's public claim and the official record line up — and where they don't — so you can ask the right question.

What the labels mean

• AMS-accredited — the highest bar: AMS formally reviewed the school against its standards. Relatively rare.
• AMS member — the school holds an AMS membership. This is not accreditation. Membership has tiers (full member, and Pathway stages such as “Verified”).
• AMI / AMI-recognized — affiliated with the body Maria Montessori founded; AMI recognition is a separate, rigorous standard.
• IB (PYP) — an authorized International Baccalaureate Primary Years Programme school.
• Montessori-inspired / independent — uses Montessori ideas without a current third-party affiliation. Perfectly legitimate — just verify what matters to you.

The key trap: member ≠ accredited, and marketing often blurs the two. See the deeper explainer in Is it real Montessori?

How to verify a school yourself — in five minutes

• Check AMS. Go to amshq.org/schools and search the school's name (or “New York, NY”). A current school appears with a seal — Accredited, Member, or a Pathway stage. If it doesn't appear, it is not in AMS's current directory.
• Check AMI. Go to amiusa.org/school-locator and filter by New York. AMI recognition is separate from — and rarer than — AMS.
• Check IB. Use Find an IB World School at ibo.org.
• Ask the school directly. “Are you a current AMS member or AMS-accredited for 2026–27?” Memberships lapse and renew — ask for this year's status, and whether it's membership or accreditation.
• Read the tier, not just the logo. An “AMS” logo can mean accredited, member, or a teacher's credential. They are very different claims.

Verified in an official directory (August 2026)

These schools' labels matched the official record when we checked.

Claimed, but not in the current directory (August 2026)

Each school below describes itself as affiliated (on its own website or in third-party listings), but does not appear in AMS's current online directory when we checked. AMS membership renews annually, so the most likely explanation is a lapsed or in-progress listing — not misconduct. We've kept the school's stated label and added this note so you can confirm the current status directly.

A flag is a prompt to ask, not a verdict. Many flagged schools are well-regarded; some may simply be mid-renewal, listed under a different legal name, or accredited by a body we didn't check (for example Middle States, which several Twin Parks pages cite). If you have documentation that updates any row, please send us a correction and we'll update it.

Correction · August 10, 2026 — and an admission about our own method. We found a bug in how we were querying the AMS register: the geographic search we relied on cannot see records that carry no map coordinates, and roughly three-quarters of the register has none. Re-running by name, ZIP and city sweeps changed nine of our labels. Three schools were under-credited by us — Battery Park, Children’s Harbor and Paché are at AMS’s VERIFIED tier, not ordinary membership, and are the only three verified schools in the five boroughs. North Side School is an AMS member after all, which we had marked unverified. The Family School makes no AMS claim of its own anywhere — that one was an aggregator’s error that we repeated, and we are sorry for it. We have also corrected an AMS claim we had inherited on the closed Guidepost Museum Mile entry, and made our AMI wording precise: The Montessori Schools’ two campuses hold two different AMI tiers, both scoped to ages 0–3 only. Full working: our published method notes.

Correction · August 8, 2026. A re-check against AMS’s directory found five schools we had flagged are now listed, and they have been moved to the verified table above: Twin Parks — Park West and Twin Parks — Riverside (both AMS Accredited — so all three Twin Parks campuses are now confirmed), The Caedmon School, Morningside Montessori School and Montessori Day School of Brooklyn (all AMS members). Pine Street School, which we listed for its IB authorization, also now appears as an AMS member. AMS’s membership year begins July 1, so these listings most likely reflect ordinary annual renewals processing rather than any change at the schools. Our earlier July note about the Twin Parks campuses is superseded by this one. We re-check regularly and correct the record when we get something wrong.

Method & caveats

• What we checked: each school's claimed AMS / AMI / IB affiliation against those organizations' own public directories.
• When: last re-checked August 8, 2026 (first verified July 2026). Listings change — always re-check for your admissions year.
• Presence is reliable; absence is a prompt. Appearing in a directory confirms current status. Not appearing means “not currently listed,” which can result from a lapsed renewal, a name mismatch, or a school opting out — so we frame it as a question, not a conclusion.
• Scope: we assessed public affiliation records only — not teaching quality, safety, or how good a fit a school is for your child.