Lancaster specified an ideal classroom (hall) as being a parallelogram, the length about twice the width. The windows were to be six feet from the floor. The floor should be inclined, rising one foot in twenty from the master's desk to the upper end of the room, where the highest class is situated. The master's desk is on the middle of a platform two to three feet high, erected at the lower end of the room. Forms and desks, fixed firmly to the ground, occupy the middle of the room, a passage being left between the ends of the forms and the wall, five or six feet broad, where the children form semicircles for reading.