
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 (24)

Southbank International School (Kensington) is a co-educational day school for pupils aged 2 to 11, located in the Notting Hill area of London. Housed in two adjoining Victorian villas, the campus follows the International Baccalaureate Primary Years Programme, emphasising inquiry-based learning and global citizenship. With a diverse community representing nearly 40 nationalities, the school offers facilities including a STEAM room, a bespoke art studio, and a garden with play equipment. Pupils typically transition to the school’s Westminster campus at age 11 to continue their IB education within a multicultural environment.

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.

Sevenoaks School is a co-educational day and boarding school for pupils aged 11 to 18, situated on a 100-acre campus in Kent, bordering Knole Park. Founded in 1432, it is one of the United Kingdom's oldest non-denominational schools. The school emphasises a global outlook and was a pioneer in adopting the International Baccalaureate (IB) Diploma, which it has offered exclusively since 1999. The site features a mix of historic buildings and contemporary facilities, including 'The Space', a purpose-built performing arts centre, and a state-of-the-art science and technology centre.

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.

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.

Lycée International de Londres Winston Churchill is a co-educational independent day school in Wembley, North London, for pupils aged 3 to 18. Established in 2015, it is housed in the Grade II listed Brent Town Hall, a refurbished Art Deco landmark on a five-acre campus. The school provides two bilingual pathways: the French national curriculum leading to the Baccalauréat and an English-language track culminating in the International Baccalaureate (IB) Diploma. Facilities include modern science laboratories, an indoor gymnasium, and outdoor sports courts, fostering an environment of academic rigour and international-mindedness.

RGS Surrey Hills is a co-educational day and boarding school for pupils aged 11 to 18, situated in Mickleham, near Dorking. Set within 40 acres of countryside, the school's centrepiece is Dalewood House, a Victorian Gothic revival mansion. Founded in 1959, it is a founding member of the Round Square movement, following the holistic educational philosophy of Kurt Hahn. The school offers a choice between A-Levels and the International Baccalaureate Diploma. Facilities include a modern sports hall and grounds that support a range of activities, including outdoor education and traditional team sports.

Worth School is a co-educational Catholic day and boarding school for pupils aged 11 to 18, set within 500 acres of West Sussex countryside near Turners Hill. The school is located on the historic Paddockhurst estate alongside Worth Abbey, a Benedictine monastery. Its ethos is guided by Benedictine values of community and service. Architectural highlights include the circular 1960s abbey and the modern Spencer Building. Facilities feature a professional-standard theatre, a golf course, and a dedicated Sixth Form centre. Pupils can study either A-Levels or the International Baccalaureate within a diverse extracurricular programme.

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.

Kent College Canterbury is a co-educational day and boarding school for pupils aged 3 to 18, situated on an 80-acre site overlooking the historic city of Canterbury. Founded in 1885 as a Methodist school, it comprises a junior school, senior school, and sixth form. The school is notable for its working farm, which allows students to engage in agricultural activities. Facilities include the Great Hall for performing arts and extensive sports grounds. The curriculum offers both A-levels and the International Baccalaureate Diploma Programme, alongside a broad range of extracurricular activities.

Southbank International School (Westminster) is a co-educational day school for pupils aged 11-18, spread across three central London sites. Established in 1979, it was the first school in the United Kingdom authorised to deliver all three International Baccalaureate programmes. The Westminster campus, which includes a Grade II listed building on Portland Place, focuses on the Middle Years and Diploma Programmes. Embodying a "school without walls" ethos, it utilises London's cultural landmarks as extended classrooms. Facilities include specialised science labs, a digital design lab, and a dedicated sports centre in Kilburn.