
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 (22)

ACS Cobham International School is a co-educational day and boarding school for pupils aged 2 to 18, situated on a 128-acre campus in the Surrey countryside. The school offers a global curriculum, including the International Baccalaureate (IB) Diploma and the American Advanced Placement (AP) programme. Facilities include a state-of-the-art sports centre with a 25-metre competition pool, an Olympic-sized track, and a 510-seat performing arts theatre. Founded in 1967, the school emphasises developing well-rounded global citizens through a diverse range of academic, sporting, and extracurricular opportunities.

Ardingly College is a co-educational boarding and day school for pupils aged 2 to 18, situated on a 230-acre campus in the West Sussex countryside near Haywards Heath. Founded in 1858 by Canon Nathaniel Woodard, the school features notable Gothic Revival architecture and a Grade II listed chapel. The college emphasises a "world-ready" ethos, providing a choice between A-levels and the International Baccalaureate in the Sixth Form. Facilities include a dedicated art school and access to a reservoir for water sports. It maintains a strong focus on competitive sports, including football, hockey, and cricket.

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 a co-educational independent boarding and day school for pupils aged 13 to 18, situated on a 250-acre campus in Godalming, Surrey. Founded in London in 1611 by Thomas Sutton, the school relocated to its present site in 1872, where it is housed in distinctive Gothic Revival buildings. The curriculum balances academic rigour with music, the arts, and sport. Notable facilities include the Queen’s Sports Centre and an art studio. Historically, Charterhouse is recognised for its significant role in the early development and codification of association football rules.

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 a co-educational international day school for pupils aged 2 to 18, located in the North Finchley and Friern Barnet areas of London. With historical roots dating back to 1885, it was the first school in the UK to offer the full International Baccalaureate curriculum across all age groups. As a member of a global network of schools, it emphasises a personalised approach to learning and a commitment to international-mindedness. The school provides a multicultural environment for its diverse student body, focusing on individual development through a broad academic and extracurricular programme.

Fulham School is a co-educational independent day school in London, founded in 1996. Operating across several sites in Fulham, the school provides a broad education for pupils from nursery age through to eighteen. The preparatory school is housed in a Victorian building on Greyhound Road, notable as a former filming location for the television programme Grange Hill. As a member of the Inspired Education Group, the school follows a holistic ethos centred on academics, sport, and the performing arts. Facilities include specialist science laboratories, creative art studios, and various all-weather sports pitches.

Godolphin and Latymer School is an independent day school for girls aged 11 to 18, situated in Hammersmith, West London. Established in 1861 as a boys’ school, it was reconstituted in 1905 with support from the Latymer Foundation. The campus features Victorian architecture alongside contemporary facilities, notably the Bishop Centre for performing arts, housed in a converted church designed by William Butterfield. Students in the Sixth Form choose between A Levels and the International Baccalaureate Diploma. The school’s ethos encourages intellectual curiosity, independent thought, and a commitment to social responsibility.

Haileybury is a co-educational independent day and boarding school for pupils aged 11 to 18, set within a 500-acre campus in Hertford Heath. Established in 1862 on the site of the former East India College, the school is home to historic architecture, including a chapel by Arthur Blomfield and one of the largest academic quadrangles in the UK. Academically, the school offers both A-levels and the International Baccalaureate Diploma. Facilities include a recently developed Science and Technology Centre, which supports an ethos focused on intellectual curiosity and global citizenship.

Halcyon London International School is a co-educational, not-for-profit day school for pupils aged 11 to 18, situated in Marylebone. Founded in 2013, it is an International Baccalaureate (IB) World School offering the Middle Years and Diploma Programmes. The school’s ethos focuses on innovation, student agency, and a research-led approach to wellbeing and restorative practice. Recognised as a Google Reference School and Apple Regional Training Centre, it integrates advanced technology into its teaching. The school occupies a central site near Marble Arch, utilising local facilities including the Seymour Leisure Centre and Hyde Park for sport and recreation.

ICS London is a co-educational independent day school for pupils aged 3 to 18, situated across two campuses in central London. Founded in 1979, the school is an International Baccalaureate (IB) World School, delivering the Primary Years, Middle Years, and Diploma Programmes. The primary department is housed in a renovated Victorian building in Marylebone, while the secondary campus is located on Star Street. Emphasising a global perspective and personalised learning, the school supports a diverse community, utilising its central location to integrate local cultural and sporting facilities into its curriculum.

Jeannine Manuel School is a co-educational bilingual day school for pupils aged 3 to 18, located in the heart of Bloomsbury, London. Opened in 2015, it is the sister school of the Paris institution founded in 1954 by French Resistance member Jeannine Manuel. The school is housed across three sites in historic listed buildings on Russell Square and Bedford Square. Its ethos emphasises international understanding and pedagogical innovation within a multicultural community. Students follow a bilingual curriculum, preparing for either the French International Baccalaureate (BFI) or the International Baccalaureate (IB) Diploma.