24. Are the IS students mixed with the ‘mainstream’ French students for core subjects?

In collège no – the IS class stays together for all classes, apart from some mixing for the additional language options from 5ème (Spanish, Italian, Latin, and later Greek). In lycée, commencing in 1er, the students in the IS class are only together for the subjects taught in English, French literature classes, and enseignement moral et civique (EMC).