
The International Baccalaureate Organisation is a non-profit foundation headquartered in Geneva that provides four distinct educational programmes for students aged 3 to 19. Unlike a trade association, the IBO functions as an examination board and curriculum developer, authorising institutions as "IB World Schools." In the UK independent sector, it is best known for the IB Diploma Programme (IBDP), a rigorous, holistic alternative to A-levels that emphasises critical thinking, global mindedness, and intercultural understanding.
IBO Member Schools (15)

ACS Cobham International School is a co-educational day and boarding school situated on a 128-acre woodland campus in Cobham, Surrey. Located approximately 20 miles from Central London, the school enrols students aged 2 to 18 from over 60 nationalities. The curriculum includes the International Baccalaureate (IB) Diploma and an American curriculum, offering Advanced Placement (AP) courses and leading to a US high school diploma. The school claims to focus on innovation, academic excellence, and global awareness. Facilities include extensive sports amenities and a performing arts centre.

ACS Egham International School is a co-educational institution situated in the Surrey countryside, near The Savill Garden and approximately 25-30 miles from central London. The school claims to offer a world-class personalized learning approach within a diverse international community of over 50 nationalities. It is an IB World School, notably one of two in the UK to provide all four International Baccalaureate programmes for students aged 4-18. The campus, set in extensive parkland, features state-of-the-art facilities.

Buckswood School is a co-educational day and boarding school situated on a 40-acre country estate in Guestling, East Sussex. Occupying Broomham Hall, which features a 15th-century main house, the school provides a rural setting described as a "global school in the heart of the British countryside." The curriculum includes GCSEs, A Levels, and the International Baccalaureate. Guided by its "12 Pillars" ethos, the school claims to focus on internationalism and personal development. Notable campus facilities include a specialist football academy, riding stables, a vineyard, and a woodland activity centre.

Charterhouse is an independent boarding and day school situated within a 250-acre campus in the Surrey Hills National Landscape, near Godalming. The school's rural grounds feature woodland, lawns, and extensive sports facilities, including numerous pitches, a sports centre with a swimming pool, and a golf course. The school became fully coeducational from the age of 13 in September 2021. Charterhouse claims to focus on an all-round education, aiming to equip pupils to be "future-ready" and instilling academic rigour, intellectual curiosity, and values such as compassion and integrity.

Christ's Hospital is an independent co-educational boarding and day school for students aged 11-18, situated on a 1,200-acre estate south of Horsham, West Sussex. Established in 1552, the school operates under a royal charter and is known for its charitable foundation. It claims to challenge inequality by providing a nurturing education to young people from diverse backgrounds, with a majority of students receiving means-tested bursaries. The curriculum aims to combine academic ambition with a focus on broader opportunities in sports, music, art, and drama.

Dwight School London is an independent, co-educational international school situated across multiple campuses in North London, including the North Finchley and Friern Barnet areas. It caters to students aged 2 to 18, offering the full International Baccalaureate (IB) curriculum at all three levels (PYP, MYP, DP). The school claims to focus on personalised learning, aiming to "ignite the spark of genius in every child," alongside fostering community and a global vision. As an academically non-selective institution, it is part of the wider Dwight global network of schools. The urban setting includes various school sites, sports fields, and a forest school area.

Fulham School, originally founded as Fulham Preparatory School, is a co-educational independent day school located in Greater London. Situated across multiple urban campuses, including Greyhound Road and Fulham High Street, it caters to pupils from nursery to Sixth Form, though its Senior School is due to close at the end of the 2025 academic year. The school claims to focus on nurturing academic excellence, character development, and personal growth. Fulham Pre-Prep was awarded the ISA Junior School of the Year 2024. Facilities include playgrounds, sports pitches, and dedicated arts and science spaces.

Godolphin and Latymer School is an academically selective independent day school for girls aged 11-18, situated in Hammersmith, West London. The school offers both A Level and IB Diploma pathways in the Sixth Form. It claims to foster a caring, kind, and inclusive community, encouraging individual talents and a wide range of extracurricular activities. The school was awarded London Independent School of the Year 2023 and Sunday Times IB School of the Year 2023.

King Edward's Witley is a co-educational day and boarding school for pupils aged 11-18, situated in Witley, Surrey. Established in 1553, the school occupies a 100-acre wooded campus within a designated Area of Outstanding Natural Beauty. It maintains strong links with the City of London. The school claims to focus on personal growth, kindness, mutual respect, and diversity, with its motto being "United by Diversity since 1553." It offers a curriculum that includes both A-Levels and the IB Diploma.

Lycée International de Londres Winston Churchill is a co-educational, bilingual independent day school, founded in 2015 and located in Wembley, North London. Situated on a leafy five-acre campus, it incorporates the Grade II-listed former Brent Town Hall. The school caters for students aged 3 to 18, offering both an English International Programme (leading to IGCSEs and the International Baccalaureate) and the French Baccalauréat. The school claims to focus on developing responsible, creative, and principled global citizens through a rigorous, bilingual curriculum.

Marymount International School London is an independent Catholic day and boarding school for girls aged 11-18. Established in 1955, it is situated on a 7-acre campus in Kingston upon Thames, bordering the picturesque Surrey countryside. The school claims to focus on the academic, emotional, spiritual, and social development of its students, welcoming diverse faiths and backgrounds. It was the first all-girls' school in the UK to adopt the International Baccalaureate curriculum, promoting independent thought and global citizenship within its international community.

Reigate Grammar School is an independent co-educational day school for pupils aged 11-18, situated in Reigate, Surrey. Founded in 1675, the school maintains a selective admissions process. It claims to focus on nurturing character, resilience, and academic excellence, balancing this with social responsibility. The main campus is located near Reigate town centre, with additional sports facilities at RGS Hartswood.