The Challengers 300, ranked.

United Arab Emirates · Emirates Hills

Launched the UAE's first full IB continuum in 2005, and the only Dubai school to win back its top KHDA rating after losing it

Saudi Arabia · Eastern Province

In Dhahran's oil-country heartland, a bilingual campus founded in 1977 pairs IB rigor with an Arab and Islamic identity.

China · Sichuan

Heir to a Yuan-dynasty academy, this Chengdu institution now streams live classrooms to hundreds of schools across western China.

Singapore · Singapore

Singapore day school pairing IGCSE with the IB Diploma.

Canada · Manitoba

Founded in 1820 on a Red River oxbow, Western Canada's oldest independent school built its name on debate and public speaking.

Denmark · Zealand

A former Cistercian monastery turned 1586 boarding school, pairing lakeside tradition with a modern natural science centre.

Taiwan · Taipei

British, French and German national curricula run in parallel here, converging on Yangmingshan into one shared IB Diploma.

Australia · NSW

In Burwood since 1886, founded to ready girls for University of Sydney entrance just as women won degree rights.

Australia · Queensland

On Norman Creek in East Brisbane, this century-old GPS boys' school pairs IB Diploma rigor with Queensland's QCE pathway.

Hong Kong · Hong Kong

Twin teachers, one Western and one Chinese, co-teach every class at this Kowloon Tong pioneer of bilingual education since 1932.

India · Delhi

Set inside the Sri Aurobindo Ashram since 1956, this CBSE day school built its ethos on integral education long before wellness curricula were trendy.

United States · New Jersey

On a 187-acre abbey campus outside Morristown, Benedictine monks still guide a rigorous, near-1,500-year-old liberal arts tradition.

Belgium · Brussels-Capital Region

A 40-acre campus tucked into the Foret de Soignes beside a UNESCO site, pairing British roots with one of the world's earliest IB programmes.

Vietnam · District 2

On the Thu Thiem riverside, Saigon's only on-campus boarding house pairs IB rigor with an Australian ethos of fair play.

Argentina · Buenos Aires

Founded in 1920 by two women educators, this Zona Norte school pairs Anglo-Argentine heritage with a full IB continuum across twin campuses.

Argentina · Ciudad Autónoma de Buenos Aires

Founded in 1661 as a Jesuit college, this UBA-run school still teaches Latin and Greek en route to Nobel laureates and four presidents.

United States · New Jersey

Founded in 1774, this Livingston day school remains New Jersey's only private IB Diploma provider

Singapore · Singapore

Three curricula, one campus: IB, Cambridge and CBSE converge inside Punggol's digital learning district.

Turkey · Istanbul

Founded in 1863 above the Bosphorus, this bilingual campus remains the oldest American school still running outside the U.S.

United Arab Emirates · Abu Dhabi

On Saadiyat's museum mile, sixth-formers debate round Harkness tables before choosing A-Levels or the IB Diploma

Philippines · Metro Manila

Oldest not-for-profit British school in Manila, houses named Luzon, Visayas, Mindanao, IB scores six points above world average.

United States · Ohio

One of the nation's first country day schools, offering AP-caliber rigor without AP labels across 231 wooded acres near Columbus.

Thailand · Bangkok

Founded in 1992 with United Nations backing, Thailand's first not-for-profit IB World School sits amid downtown Sukhumvit.

United Arab Emirates · Dubai

Secondary-only in Al Safa, holding Dubai's top inspection grade every year since 2010, with A-Levels ranked in the global top 1 percent.

United States · New Jersey

A hilltop New Jersey campus, founded 1848, where the weekly Society of Skeptics turns global debate into a signature course of study

Vietnam · Long Bien District

Riverside campus in Long Bien pairs a British primary grounding with a Juilliard-curated music curriculum en route to the IB Diploma.

South Korea · Gyeonggi Province

South Korea's first science high school, now a gifted academy where research credits outweigh lectures and early admits vault to KAIST.

China · Jiangsu

On an island in Kuncheng Lake, mainland China's first UWC pairs the IB diploma with mandatory Mandarin study and a student-run Zhixing service programme.

United Kingdom · Dorset

Beside the abbey it has neighboured for 1,300 years, seven historic boarding houses still set the rhythm of school life.

India · Andhra Pradesh

Founded by philosopher Jiddu Krishnamurti in 1926, this valley campus is both a certified bird sanctuary and a pioneering lab for rural education reform.

Canada · Ontario

On 315 lakefront acres in the Kawarthas, Canada's first Round Square school pairs Ontario academics with expedition-based leadership training.

United States · Colorado

A 94-acre wooded campus below the Rockies where week-long Interim trips turn the outdoors into a classroom.

China · Beijing

Rooted in a 400-year London lineage, its Shunyi campus has posted IB scores averaging seven points above the global mean for four straight years

United Kingdom · Europe

Modern scholarship for girls with a Tideway boathouse

Brazil · São Paulo

Born from a vestibular cram course, this Sao Paulo school now claims 8 of Brazil's 15 Math Olympiad golds since 1998.

Netherlands · North Holland

The Netherlands' oldest lyceum, its landmark Amsterdam School building sends every class to a century-old forest retreat each year.

United Arab Emirates · Dubai

A 170-year London academic lineage transplanted to Sobha Hartland, where the IB Diploma average has topped the region

South Korea · Gyeonggi Province

Korea's first fully recognized foreign school since 1973, pairing 24 AP courses with Suzuki violin from junior kindergarten

United States · Missouri

A 1984 merger of two century-old single-sex academies, this Kansas City day school pairs Country Club Plaza roots with hands-on STEM rigor.

United States · New Jersey

New Jersey's only nonsectarian girls' day school, built on a historic Tudor estate and anchored by its own Ethics Institute.

Saudi Arabia · Riyadh Province

Since 1963, north Riyadh's dual-diploma pioneer pairs an American high school degree with the IB, drawing 65-plus nationalities to one campus.

Argentina · Buenos Aires

Since 1912, four houses have anchored a Belgrano campus blending English immersion from age two with Cambridge A-levels.

Australia · Victoria

Victoria's only academically selective boys' school, its hilltop South Yarra campus earning the nickname Castle on the Hill.

Japan · Tokyo

Five minutes of traditional needlework open every school day, discipline behind one of Tokyo's toughest routes into the University of Tokyo.

Japan · Tokyo

Since 1908, a wooded Hiroo campus anchors Japan's oldest all-girls international school, blending Sacred Heart values with 23 AP courses.

Egypt · Cairo Governorate

Founded in 1945 as Egypt's only US State Department-sponsored school, pairing an American diploma with an IB pathway dating to 1993.

Australia · New South Wales

Gothic Revival GPS founder in Sydney's inner west, home to Australia's first schoolboy rugby match, now turning fully co-educational by 2033.

India · Maharashtra

A seaside Mahim campus rooted in an 1847 Scottish orphanage, still turning in some of India's top ICSE and ISC results.

Philippines · Metro Manila

Atop Quezon City's Loyola Heights, Jesuit college-prep formation anchors a senior high that only went co-ed in 2016.

South Africa · Eastern Cape

On the Eastern Cape frontier since 1855, house tradition and shared classes with a sister school shape a distinct boarding life.

South Korea · Gyeonggi Province

Born from a rare city-university pact, this rural Yongin campus once split students into language majors from English to Japanese and Chinese.

United Kingdom · City of Edinburgh

Founded in 1824 with Sir Walter Scott's blessing, this Edinburgh day school still plays rugby's oldest continuous school fixture.

Sri Lanka · Western Province

Tracing its roots to 1835 as Ceylon's first state secondary school, still marking each term with the storied Battle of the Blues cricket clash.

United Arab Emirates · Dubai

In Al Barsha South, this outpost of England's Brighton College turns a 'cool to care' culture into record-breaking A-level results.

United Arab Emirates · Dubai

Where the CISCE curriculum and the IB Diploma share one campus, and the only Indian-curriculum school in Dubai rated Outstanding by KHDA.

United Kingdom · Derbyshire

Founded in 1557 on a former Augustinian priory, its ten houses still dine together with no central hall.

Denmark · Capital Region of Denmark

On Copenhagen's harbour edge, an IB campus wrapped in 12,000 sea-green solar tiles powers half its own classrooms

United States · Arizona

Arizona's only Jesuit high school since 1928, forming 'Men for Others' beneath a 135-foot Spanish Colonial bell tower

United States · California

A 4x4 block schedule and pre-professional arts conservatories fuel a STEM-and-stage culture in suburban San Diego.

Thailand · Don Muang

The first Harrow campus outside Britain, where a private lake hosts dragon-boat races and a six-house system still defines school life.

United Kingdom · Europe

Kingston’s co-educational grammar school on the Thames since 1561

United States · New York

Founded in 1709 as a charity school, now the oldest continuously operating school in New York City, still built on a rare full Classics department

Australia · New South Wales

Australia's first state high school, and still the only government member of the elite GPS sporting competition, steps from the Moore Park precinct.

United Kingdom · Buckinghamshire

A Victorian pioneer's 1896 foundation, this Chiltern hills estate blends mixed-age boarding houses with one-in-five Oxbridge offers.

Japan · Setagaya-ku

On a Setagaya hillside, a Catholic all-boys campus pairs an American diploma track with the IB, blending faith and rigor since 1954.

Germany · Bavaria

Housed in a former 1875 castle on Lake Starnberg, this Bavarian campus channels nearly every senior into the full IB Diploma.

Portugal · Setúbal District

Between Lisbon and Comporta, twin pathways pair Portugal's national curriculum with British IGCSEs and the IB Diploma

Argentina · Buenos Aires

Founded by Irish Christian Brothers in 1948, this Boulogne day school pairs a full IB diploma with a rugby culture that has fed Argentina's Pumas.

Canada · Ontario

A 1901 boys' school and a 1923 girls' school merged atop Hamilton Mountain into the city's only Pre-K-12 independent campus.

United Kingdom · Greater London

A 1624-founded, non-denominational day school in Hammersmith prized for its stellar Oxbridge and Russell Group outcomes.

South Korea · Seoul

Korea's pioneering foreign-language school, pairing five-language immersion tracks with a Global Leadership Program aimed at Ivy League admissions.

United Kingdom · Essex

One of twelve founding HMC schools, pairing a Guildhall music partnership with sixth-form choice between A levels and the IB.

Thailand · Koh Kaew

Eight boarding houses and four sport academies sit across a 44-acre tropical campus pairing British curriculum with the IB Diploma.

Germany · Hesse

A founding member of the International Baccalaureate since the 1960s, still shaping the diploma from its Taunus forest campus.

United States · New Jersey

New Jersey MAPL boarding school with strong basketball, rowing, and football programmes.

Netherlands · Utrecht

Founded in 1474 as a Latin school, this Utrecht gymnasium still pairs Greek and Latin with robotics and philosophy.

United Kingdom · Hertfordshire

Single-sex teaching by day, shared sixth-form classes by choice, on a 100-acre Hertfordshire campus built for top 0.5% GCSE results

United Kingdom · Greater London

A 1442 bequest from the City's own Town Clerk still funds this rigorous day school perched on the Thames at Blackfriars.

South Korea · Gangwon Province

On a Gangwon mountainside, hanbok-uniformed students hold English-only seminars, chasing an IB curriculum built to rival Eton.

China · Shanghai

Anchored to East China Normal University in Shanghai, this campus has quietly become a steady pipeline of physics and math Olympiad gold medals.

China · Guangdong

Southern China's oldest American day school since 1981, pairing AP rigor with a Science City campus built for real-world learning.

India · Delhi

Beside the U.S. Embassy in Chanakyapuri, a Joseph Stein-designed campus mixes American college prep with IB rigor for over 70 nationalities.

Singapore · Singapore

A rare dual exit for seniors: the IB Diploma or Australia's HSC, the latter paired with vocational training in construction and hospitality.

Canada · Ontario

Predating Confederation itself, this Lake Ontario campus anchors ten storied houses around one of Canada's few AP Capstone diplomas.

France · Provence-Alpes-Côte d'Azur

In Sophia Antipolis's tech park, five language sections converge around the OIB, feeding a boarding lycee's grandes ecoles prep classes.

United States · Ohio

A 1906 girls' prep and a 1916 open-air school merged into Ohio's largest nonsectarian K-12 day school in Cincinnati.

United Arab Emirates · Dubai

Juilliard-trained arts coaching and MIT-designed STEAM projects anchor this British-IB day school in Al Barsha South.

Spain · Madrid

On Calle America in Pozuelo, a 1961 founding became the first Spanish school to pair a US diploma with the full IB Diploma Programme.

United Kingdom · Greater London

A 1615 charity foundation turned super-selective grammar, thriving on a former Croydon airfield with a sharp focus on maths and computing.

United Kingdom · Europe

London co-educational day and boarding school founded in 1807

United Kingdom · Edinburgh

Edinburgh boarding and day school with small classes and a notably low student-teacher ratio

United States · Pennsylvania

In the Pennsylvania hills, a century-old aquatics program has sent more than two dozen swimmers to the Olympics.

United States · Pennsylvania

Born in 1851 as the nation's first family boarding school, still pairing faculty and students under one roof on a Pottstown hilltop.

United States · Florida

On Biscayne Bay since 1903, where sailing and marine science turn the water itself into a classroom

Qatar · Qatar

Qatar's first school to pair AP rigor with the IB diploma, set on a campus anchored by the country's only baseball field.

United States · Georgia

Behind a converted Buckhead castle, the Isdell Center for Global Leadership sends classrooms from the Four Corners to Iceland.

Australia · New South Wales

NSW's oldest state girls' school, built in 1916 on the old Moore Park zoo site, still selective-entry and HSC-strong.