The Montessori classroom is an environment prepared by the adult for children. All aspects of the environment are carefully selected, thoughtfully arranged and sequentially presented to match the developmental needs of the children using the space. Everything is child-sized to encourage children to do things independently. 

The environment is prepared with a focus on order and reality, beauty and simplicity. A trained adult and a large enough group of children of mixed ages make up a vital part of the prepared environment.