About Trillium International School
A Bilingual, Multilingual and Multicultural School of Excellence
Catering to both international families and local families seeking a high-quality international education, Trillium International School offers a bespoke bilingual programme from Pre-Primary to Primary in a caring, rigorous and globally minded environment.
As a bilingual private school located near Saint-Germain-en-Laye, our mission is to provide an international education that combines academic excellence, multilingual development, and strong human values.
Our Educational Pillars
Our Educational Philosophy
Children First
We believe in the transformative power of education for children. Treating children with respect and nurturing their individuality allows them to develop confidence, curiosity, and a lifelong love of learning. In our bilingual and Montessori-inspired environment, each child is considered in their emotional, intellectual, and human dimension.
Academic Rigor & Excellence
As an international school of excellence, we implement rigorous academic programmes that enable every child to reach their full potential. Our structured and high-quality curriculum prepares students for international pathways and demanding academic environments.
Language Learning – Multilingual Education
Language acquisition is at the heart of our bilingual and multilingual school model. Students learn in both English and French through immersive teaching, which promotes cognitive flexibility, cultural awareness, and academic success in an international context.
International-Mindedness & Multicultural Environment
We provide a multicultural environment that celebrates diversity and encourages open-mindedness. Our students learn to value different cultures, perspectives, and identities, preparing them to thrive in a global and interconnected world.
Home Languages Support
International and globally mobile families often wish to preserve their children’s connection to their home language, culture, and identity.
As a multilingual international school, Trillium International School supports home languages by offering dedicated time and pedagogical flexibility, allowing children to maintain their linguistic and cultural roots while thriving in a bilingual environment.
How We Teach
How we teach is as important as what we teach. School should not only prepare students for a diploma or career path, but also for a meaningful and fulfilling life. Trillium International School welcomes children aged 2 to 11 in an international, multicultural, and caring environment that does not impose a single cultural model, while encouraging global awareness and personal development. We support children who are learning English or French, as well as already bilingual students. In addition to French and English language and literature, students study mathematics, sciences, humanities, arts, and physical education in English within an immersive bilingual framework. This combination of bilingual immersion and structured academic excellence enables rapid language acquisition and strong academic progress.
What We Do
We provide high-quality international education adapted to the French context. Our bilingual private school offers a structured, rigorous, and nurturing environment that differs from traditional French schools while remaining fully compatible with international families and multicultural backgrounds.
Why Choose Us
National education systems primarily prepare students to become citizens of one nation. An international and bilingual education, based on both the French and British programmes, aims to develop true global citizens.
At Trillium International School, we offer a locally grounded international education that:
Combines academic excellence and wellbeing Promotes multilingual and multicultural learning Prepares students for international and French secondary schools Develops confident, autonomous and globally minded children
School Leadership
Sandrine Lavecot
Head of School
Alexandrine Deliancourt
Manager Director
Simone Pouwels
Pre‑Primary Director
Meet the team behind our school
Address
9 rue de la Sabotte,
78160 Marly-le-Roi
Other links
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