Trillium International School
Bilingual International School of Excellence in Marly-le-Roi

Trillium International School is an international private school, independent from the French national system, and authorised and inspected by the French Ministry of Education.

We collaborate with embassies and leading secondary schools in the region, including Lycée International (British and American sections), La Jonchère in Saint-Cloud, and Collège de Noisy-le-Roi (Section Internationale Grand Chêne).

Our British programme is validated, and our students take both French and British national assessments. In 2025 and 2026, our students achieved a 100% success rate in entrance examinations.

No. Fluency in English or French is not required to join our bilingual international school.

Language support is provided in both languages, and multilingual students are supported until they become proficient in English, French, or both.

Classes take place from 8:45 a.m. to 4:00 p.m., and from 8:45 a.m. to 12:15 p.m. on Wednesdays. Students benefit from a balanced schedule including lunch time, morning and afternoon recess, and immersive bilingual learning.

Classes take place from 8:45 a.m. to 4:00 p.m., and from 8:45 a.m. to 12:15 p.m. on Wednesdays. Students benefit from a balanced schedule including lunch time, morning and afternoon recess, and immersive bilingual learning.

Pastoral Care Funding refers to all the support systems, wellbeing practices, and educational structures implemented by the school to ensure the emotional, social, and personal development of each child.

At Trillium International School, a bilingual and multicultural international school of excellence, pastoral care is a core part of our educational approach. It is designed to create a caring, structured, and supportive environment where students feel safe, confident, and valued.

This includes daily emotional support, individual attention, a nurturing classroom atmosphere, and strong guidance adapted to each child’s needs. Our pastoral care approach ensures that children thrive not only academically, but also socially and personally, in a wellbeing-focused private school environment inspired by international and Montessori best practices.