7. _Physiological age should influence school classification and school curriculum._ On this subject the studies of Dr. C. Ward Crampton, referred to in the chapter on Vitality Tests, are invaluable and as convincing as they are revolutionary. Scientists accept his proof that our present high school curriculum is ill adapted to a large proportion of children; the "physiologically too young" drop out; only the physiologically mature succeed. The two physiological ages should be given different work. Children whose bodies yearn for pictures, muscular and sense expression, should be given a chance in school for normal development. Analysis should wait for action. Organized play and physical training antedated physical examination in our schools. Like the curriculum they often disregard physiological age, doing harm instead of good. Facts as to physical condition and physiological development would enable us to utilize the momentum of these two to broaden school hygiene and to insure proper physical supervision. Only good would result from adopting Leipsic's plan of having school children examined without clothing, in the presence of parents if parents desire. Expensive? Not so expensive as high school "mortality" due to maladjusted curriculums that force the great majority of boys and girls to drop out before graduation and ruin the health of a large fraction of those who remain. 8. _Construction of school building and of curriculum so that, when properly conducted, they shall neither produce nor aggravate physical defects._ When the state for its own protection compels a child to go to school, it pledges itself not to injure itself by injuring the child. Thousands of children are now being subjected to conditions in school far more injurious than the factory and shop conditions against which the national and state child labor committees have aroused universal indignation. Two illuminating studies of school buildings in New York City were made last year by the Committee on the Physical Welfare of School Children, and later by the Board of Education. Similar studies should be made of every schoolroom. Whereas our discussions of buildings and curriculum have hitherto proceeded largely from abstract principles of light, ventilation, heating, and pedagogics, these two reports deal with rooms, equipment, courses of study, and school habits as they are, with obvious detrimental effects on child victims. Numerous questions that it is practicable to answer are given in Chapter XIV. What and when to build can be better determined after we have learned the what and the where of present equipment.