The Lycée International of St Germain en Laye is a French state school with the particularity of concentrating a variety of students from different origins as it brings together 11 national sections. According to the French educational system, these students are prepared for a final examination (the Baccalauréat) in either fields of literature, social economics or sciences. However, due to their cultural background, they are expected to take the OIB ("Option Internationale du BAC").

The campus contains a pre-school, a primary school building and a secondary school. It welcomes students who master French and other languages (such as German, English, Spanish, Danish, Norwegian, Swedish, Dutch, Polish, Portuguese, Italian, and Japanese) and international students who will learn to master the French language. The principle of the Lycée is that students who speak French must be bilingual when they enter whereas international students who speak a foreign tongue will grow, either to become bilingual or multilingual with the teaching of the French language.

Foreign teachers give the students lessons of literature, geography and history (from 6 to 8 hours a week according to the grade) in their mother tongue. However, all the other disciplines of the official program are taught in French.