
The Council of International Schools (CIS) is a global non-profit membership organization that provides accreditation, recruitment, and leadership services to schools and universities. While it is an international body, many prominent UK independent schools—particularly those with a global outlook or international student body—hold CIS accreditation to demonstrate their alignment with high global standards. The association focuses on evaluating a school's commitment to international education, student well-being, and the development of global citizenship. It also facilitates student pathways to universities worldwide and supports schools in recruiting high-quality staff.
CIS Member Schools (5)

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.

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.

TASIS The American School in England is an independent, co-educational day and boarding school located on a 46-acre campus in Thorpe, Surrey. Situated 18 miles southwest of London, it offers education from Pre-Kindergarten through Grade 12. The school claims to nurture intellectual curiosity and aims to develop principled, open-minded, and compassionate members of a global community. It emphasizes an international learning experience with students from over 70 countries. TASIS England offers the American High School Diploma, Advanced Placement courses, and the International Baccalaureate Diploma.