Hello ! To answer your email, CEM is an art/music school in Lausanne (
www.musicem.ch) . It is a private one, and it looks well organised, but never got testimonies of parents having really experienced it.
In the meantime, I visited Montessori Micki's school in Pully and I am convinced, I liked it very much (except the rooms are quite old and small) , my daughter will go there in September.
All the best,
Anahe