Kennedy International School vs Léman Manhattan Preparatory School
🇺🇸 New York · Side-by-side comparison on verifiable public data.
Neither Kennedy International School nor Léman Manhattan Preparatory School sits in a market with a public inspectorate, so both are assessed on verifiable accreditation, curriculum authorisation, and published data rather than an official quality rating. Curriculum is the core differentiator: Kennedy International School offers IB, Blended, Japanese while Léman Manhattan Preparatory School offers IB, American — the choice should follow the family's target qualification system. One practical difference: Léman Manhattan Preparatory School offers boarding while the other is day-only — decisive for families who need a residential option. Verify current fees against each school's own figures (see the table below).
Key Facts
| Kennedy International School | Léman Manhattan Preparatory School | |
|---|---|---|
| Curriculum | IB / Blended / Japanese | IB / American |
| Ages | 3–18 | 1–18 |
| Languages of instruction | English, French, Japanese | English |
| Annual fees | USD 24,000–45,000 | USD 70,700–72,000 (Kindergarten–Grade 12) |
| Enrollment | — | 750 |
| Boarding | Day only | Yes |
| Accreditations | French Ministry of Education, AEFE, NYSED-recognized | MSA, NYSAIS |
Strengths
- ✓Long heritage (founded 1964) as one of New York's established bilingual international schools
- ✓Genuine dual-immersion model — two full bilingual tracks (French-English and Japanese-English), not token language classes
- ✓Accredited by the French Ministry of Education and in the AEFE network, enabling seamless transfer into the French school system
- ✓Authorized IB Diploma Programme school since 2014, offering a rare bilingual French/English IB Diploma with Spanish as a second language
- ✓Continuous pathway from nursery (age 3) through grade 12 on two Midtown Manhattan campuses
- ✓Full vertical continuity under one operator: 12 months through Grade 12, across two purpose-fitted Financial District campuses
- ✓Recognized regional accreditation — Middle States (MSA), accredited through 2031 — plus NYSAIS, ISAAGNY and Parents League membership
- ✓IB Diploma capstone with flexibility (full IB Diploma or individual IB Course Certificates)
- ✓New York City's only residential boarding program (launched 2012) — a genuinely rare offering for a U.S. day school
- ✓Highly international community (100+ nationalities reported) with a small published average class size of 18
Trade-offs
- !Holds no US regional accreditation (WASC, MSA, NEASC, or CIS) — its quality assurance runs through the French Ministry and NYSED recognition instead
- !Publishes no current total enrollment, student-teacher ratio, or class-size data on public pages
- !Does NOT publish IB Diploma score averages or pass rates — academic outcomes cannot be independently verified
- !Does NOT publish university-placement or matriculation data
- !No published, structured EAL/ESL program on public pages, despite an immersion intake (over 50% of elementary students were reported as non-French-speakers prior to enrolling)
- !Does NOT publish IB average scores or a verified university-destination list — the headline '80% accepted to highly selective colleges' is school-reported and unverifiable
- !Full IB PYP/MYP continuum is claimed by third-party directories but NOT confirmed on the school's own pages, which describe only an 'IB approach' culminating in the DP
- !Among the most expensive schools in the sample — Kindergarten–Grade 10 at USD 70,700 and Grades 11–12 at USD 72,000 for 2026-27
- !Boarding tuition is not published on the official site (third-party directories cite figures near USD 89,000–95,000 all-in, unverified)
- !The only public enrollment figure (~750) is a 2016-17 third-party number; no current official total is published
Best Fit For
- • Francophone or francophile families wanting an authentic French-immersion education with transferability into the French system
- • Japanese expatriate and internationally-mobile families seeking a Japanese-English bilingual track in Manhattan
- • Families targeting a bilingual IB Diploma pathway (French/English) for grades 11–12
- • Diplomatic and UN-affiliated families based in Midtown (UN-staff discount available for the youngest grades)
- • Families in or relocating to Lower Manhattan wanting a single K–12 (indeed toddler-to-18) independent school
- • Families specifically seeking a U.S.-based day school with a genuine residential boarding option
- • Internationally mobile households valuing an IB Diploma pathway and a multinational student body
- • Families who can absorb premium Manhattan private-school fees (financial aid is available from Kindergarten)
University Placement
School-reported · not independently verified
School-reported, unverified: Kennedy International School does not publish IB Diploma score averages, pass rates, or a university-placement/matriculation list on its public pages, so senior-school outcomes cannot be independently verified. Its French Ministry accreditation supports transfer into the French school system, but specific university destinations are not disclosed.
School-reported, unverified: the school states that 80% of graduates are accepted to highly selective colleges, and that IB Diploma students are 'more than 20% more likely' to be admitted to the most prestigious universities. No IB average score, pass rate, or itemized university-destination list is published.
More Comparisons
Frequently Asked Questions
Should I choose Kennedy International School or Léman Manhattan Preparatory School?
Kennedy International School is best for: Francophone or francophile families wanting an authentic French-immersion education with transferability into the French system. Léman Manhattan Preparatory School is best for: Families in or relocating to Lower Manhattan wanting a single K–12 (indeed toddler-to-18) independent school. The right choice depends on target curriculum, budget, and family priorities — the two are not linearly comparable.
How do fees compare between Kennedy International School and Léman Manhattan Preparatory School?
Kennedy International School: USD 24,000–45,000. Léman Manhattan Preparatory School: USD 70,700–72,000 (Kindergarten–Grade 12). Verify against each school's own published fees; some figures are sourced from third-party aggregators.
What curricula do Kennedy International School and Léman Manhattan Preparatory School offer?
Kennedy International School: IB, Blended, Japanese. Léman Manhattan Preparatory School: IB, American.
Do Kennedy International School or Léman Manhattan Preparatory School offer boarding?
Kennedy International School: day school only. Léman Manhattan Preparatory School: offers boarding.
Questions parents ask
This comparison is BrightKey's independent assessment using verifiable public data only. University-placement figures are school-reported and not independently verified. BrightKey takes no payments from schools. Our method →