Bilingual International School in Saint-Germain-en-Laye (Ages 3–11)
Our admissions process is designed to be simple, supportive, and accessible for both local and international families seeking a bilingual, multicultural, and excellence-driven education.
Our school welcomes applications throughout the year and provides continuous support for international families settling in the Saint-Germain-en-Laye area, Marly-le-Roi, Le Pecq, Louveciennes, and the Yvelines region.
Whether you are relocating to France or already living locally, our bilingual international school ensures a smooth and personalised admissions experience.
Email: admission@trillium-international-school.com
contact@trillium-international-school.com
Phone / SMS / WhatsApp: +33 6 66 54 19 32
+33 1 80 83 93 61
At Trillium International School, Education Should Be…
As a bilingual and multilingual international school, we support children learning English, French, or both. Language support, differentiation, and inclusive teaching strategies are implemented to ensure every child progresses confidently.
International
Children who understand their identity learn to appreciate diversity and develop true international-mindedness in a multicultural environment.
Multilingual
Students thrive when supported in their strongest language while learning in both English and French through immersive bilingual education.
Rigorous
Our high-quality curriculum and high academic standards allow each child to reach their full potential in an international and excellence-driven school environment.
Caring
Children spend a significant part of their day at school. We ensure a nurturing, safe, and supportive community that respects their wellbeing, development, and individuality.
A Green and Inspiring Learning Environment Trillium International School is located in a privileged, green and secure setting that supports children’s wellbeing, confidence, and academic development.
Our campus environment is designed to promote:
Time spent outdoors is an essential part of our educational philosophy, inspired by international and Montessori best practices.
The school is easily accessible by car, bike, or public transport from:
We dream of the best for our children: the best opportunities, the best environment, and the best educational foundation.
Our bilingual, Montessori-inspired Pre-Primary programme (ages 2–5) supports each child’s natural development through immersive English and French learning, multi-age groups, and a caring multicultural environment.
Children do not need to be bilingual to join.
Our teaching team adapts to each child’s language level and supports progressive and natural language acquisition.
School Hours
8:45 a.m. – 4:00 p.m. (Mon, Tue, Thu, Fri)
8:45 a.m. – 12:15 p.m. (Wednesday)
Our Primary bilingual programme prepares students for international secondary schools, international sections, and demanding academic pathways in both the French and international systems.
Students develop:
Classes take place:
8:45 a.m. – 4:00 p.m. (Mon, Tue, Thu, Fri)
8:45 a.m. – 12:15 p.m. (Wednesday)
Extended Care & Wednesday Programme
Tuition includes wrap-around care from 8:00 a.m. to 6:30 p.m.
On Wednesdays, we encourage a balanced lifestyle aligned with the French rhythm while offering an optional non-academic programme from 8:00 a.m. to 6:30 p.m. for families who require full-day care. TUITION and FEES 2026-2027
Tuition and Fees – Academic Year 2026–2027
To be paid at the time of enrolment: €900 registration fee and €300 school supplies fee
School hours: 8:45 a.m. – 4:00 p.m. (Mon, Tue, Thu, Fri)
Wednesday morning: 8:45 a.m. – 12:15 p.m.
Annual Tuition: 9,660 € (Includes tuition + lunch + snack + pastoral fund)
Pre-Primary – Reception
School hours: 8:45 a.m. – 4:00 p.m. (Mon, Tue, Thu, Fri)
Wednesday morning: 8:45 a.m. – 12:15 p.m.
Annual Tuition: 12,860 € (Includes tuition + lunch + snack + pastoral fund)
Primary – Year 1 to Year 6
School hours: 8:45 a.m. – 4:00 p.m. (Mon, Tue, Thu, Fri)
Wednesday morning: 8:45 a.m. – 12:15 p.m.
Annual Tuition: 13,420 € (Includes tuition + lunch + snack + pastoral fund)
Choosing the right international school is one of the most important decisions for your child’s future. At Trillium International School, we provide a bilingual, multilingual, multicultural, and excellence-driven education that prepares children not only for academic success, but for life as confident and globally minded individuals.
Multilingual Enrichment Clubs – 4:00 p.m. to 5:00 p.m. (Snack Included)
As part of our multilingual and international educational approach, Trillium International School offers optional Chinese and Spanish language clubs designed to support global awareness, language development, and cultural openness.
These language enrichment clubs are conducted in a caring, structured, and multicultural environment aligned with our bilingual school philosophy and international standards of excellence.
Club Options :
These optional language clubs are available to both Trillium students and children enrolled in our extended day or enrichment programmes, supporting multilingual development within a high-quality international school environment.
5:00 p.m. to 6:30 p.m. (In English)
Trillium International School offers an optional Multi-Sports Club as part of its extended day and international enrichment programme. Conducted in English by qualified coaches, this club promotes physical development, teamwork, confidence, and wellbeing in a caring and structured bilingual school environment.
Aligned with our philosophy of holistic education and excellence, the Multi-Sports Club supports children’s social, emotional, and physical growth while encouraging a healthy and active lifestyle within a multicultural international school setting.
Activities Include
Time: 5:00 p.m. – 6:30 p.m.
Language of instruction: English
Setting: Safe, structured, and supervised by professional coaches
Annual Commitment (Full School Year Registration)
The Multi-Sports Club is available to Trillium students and children enrolled in the extended day programme, offering a premium extracurricular experience within a bilingual, multilingual, and international school of excellence near Saint-Germain-en-Laye.
Address
9 rue de la Sabotte,
78160 Marly-le-Roi
Other links
© 2026 Trillium International School
