,398 THE DISCOVERY OF THE CHILD Water-colours and drawing. Writing and reading words. Commands. First operations in written arithmetic. Reading scientific wordsgeographical, historical, biological, .geometrical, etc. Development of reading through grammatical details accom- panied by games. In the same class there ought to be mixed together children of ithree ages; the youngest, who of their own accord interest them- selves in the work of the oldest and learn from them, ought to be helped. A child who shows a desire to work and to learn must be left free to do so, even if the work lies outside the regular programme, which is indicated only for the mistress who is begin- ning a class.