The Junior School Croissy, located on the Senior School site, provides education for pupils at Key Stage 2 (Years 3 - 6) and a Nursery class for children aged 3. 

Housed in its own area of the school, ensuring a welcoming and supportive primary school environment, pupils also have access to specialist facilities such as the Sports Hall and ICT suite.

Music, sport and extra curricular activities form an important part of school life. An outdoor education trip to the Ardèche is part of the curriculum for Year 6 and pupils  in Years 4 and 5 also spend time at residential centres in the summer term.  Year 6 are also invited to participate in the School’s annual ski trip. Opportunities are given to some of the older pupils to travel to the occasional international sporting fixture and a team represents the school in the annual ECIS Primary Maths Quest.

A close link with a local French primary school, with a regular programme of joint activities, enables pupils to flourish in their local environment.