Ventilation
The matter of school-room ventilation is important. In every school-room, even during the coldest weather, some opening or openings should admit fresh air. Children should not sit where a direct draught blows upon them. Small openings at the tops of the windows furnish a safe inlet for fresh air. It is a good plan to open all the windows and doors of the school-room, for at least half an hour, after school is dismissed each day if no general ventilation system is installed. This will avoid having impure air shut in the school during the night, thereby permeating every nook and crevice of the school-room and even becoming offensive. Fresh air admitted after dismissal will keep the school-room pure and fresh and afford a place where the pupils will feel invigorated upon entering the next morning. Often, pupils come in from the fresh air only to breathe the stifling air of the school-room. Little wonder then that the teacher must complain of dull pupils before the clock points to ten. No foul air is likely to be found in a school-room at the hour of opening if fresh air is admitted each day after dismissal.