The classroom environment is arranged according to subject area, and children are always free to move around the room instead of staying at desks. There is no limit to how long a child can work with a piece of material. At any one time in a day all subjects -- math, language, science, history, geography, art, music, etc., will be being studied, at all levels.
The three-hour work cycle
For children under the age of six, there are one or two three-hour, uninterrupted, work periods each day, not broken up by required group lessons. Older children schedule meetings or study groups with each other the teacher when necessary. Adults and children respect concentration and do not interrupt someone who is busy at a task. Groups form spontaneously or are arranged ahead by special appointment. They almost never take precedence over self-selected work.
Children are grouped in mixed ages and abilities in three to six year spans: 0-3 for toddlers and 3-6 for primary age children. There is constant interaction, problem solving, child to child teaching, and socialization. Children are challenged according to their ability and never bored.