MARLY-LE-ROI, 17 October 2026. Trillium International School, a bilingual and multicultural school for children aged 2 to 11 in Marly-le-Roi, west of Paris, will hold an Open House on Wednesday 11 November, from 9am to 11am, at its premises at 9 rue de la Sabotte.
The school has announced the Open House under the title Discover Our School. It is an opportunity for families to see the setting where pupils follow a bilingual, multilingual and multicultural education in English and French.
Trillium is organised in two stages. The Pre-Primary School, for ages 2 to 5, uses a bilingual and Montessori-inspired approach in which young children explore mathematics, literacy, English, French and the world around them. The Primary School, for ages 5 to 11, combines daily lessons in mathematics, PE, French and English with an inquiry-based learning programme, preparing pupils for international and French secondary pathways.
Fluency in English or French is not required to join. The school provides language support in both languages and supports multilingual pupils until they become proficient in English, French or both. Classes run from 8:45am to 4pm, and on Wednesday mornings until 11:45am.
How to attend
The Open House takes place on Wednesday 11 November, from 9am to 11am, at Trillium International School, 9 rue de la Sabotte, 78160 Marly-le-Roi.
Families can register from the school's profile at Trillium International School. The school can also be reached by telephone on 01 80 83 93 61.
About Trillium International School
Trillium International School is an independent international private school, outside the French national system, which is authorised and inspected by the French Ministry of Education. Its British programme is validated, and pupils take both French and British national assessments. The school reports a 100% success rate in entrance examinations for its pupils in 2025 and 2026.
It works with embassies and secondary schools in the region, including the Lycée International (British and American sections), La Jonchère in Saint-Cloud and the Collège de Noisy-le-Roi (Section Internationale Grand Chêne). The school is led by its Director, Alexandrine Deliancourt, and also runs a Wednesday English Programme.
What this means for families
For international and bilingual families in the western suburbs of Paris, the Open House is a chance to see a small primary setting that prepares children for both international and French secondary schools, and to ask about language support for children who do not yet speak English or French.
Families comparing options in the region can also consult the best international schools in Ile-de-France.
