Fundamentally, even in times of peace, there is no sound reason for ever completely closing a day industrial school. It might run during the summer as well as the winter; in the late afternoon and early morning as well as in the evening. In the middle of June, 1917, President Wilson addressed a letter to Secretary Redfield making the suggestion that the vocational-training schools of the country should be open during the summer, when it would be possible to train a large number of young men under military age, either to fill the places in our industries left by men who enlist or are withdrawn for military service, or to carry on special occupations called for by the war, such as inspectors of material and apparatus. In this connection, where the President speaks of "inspectors of material," it may be said that one of the prominent industrial-education experts of the East has been asked to train a group of men selected for special government inspection work. These men will then be responsible for organizing a force of assistant inspectors in the plant to which they are assigned, and of supervising the work of the assistant inspector under their personal direction. The course of inspectorship training is made up of two units: one dealing with the business and accounting side of inspection and the other with the technical instruction which is given through participation in the actual work of inspection at the arsenal, observation of the manufacturing processes, and direct group instruction. The first unit is given at Washington and usually requires from four or five days to a week for its completion. The second unit is given at the Rock Island arsenal and covers eleven days as a minimum. Only the most experienced men, however, complete it in this length of time. The men enter the school at irregular intervals in groups of four or five at a time. The number in training at any one time varies from thirty-five to fifty. The men are moved from department to department on a fixed schedule. When a man completes his training he is assigned to a plant in accordance with his qualifications as indicated by his previous experience and his record at the school. Further plans for training the inspector after he has been assigned to the field have been proposed but have not yet been put into effect. Many of the candidates for this training are instructors in vocational training.[3] The opportunity for promotion of skilled workers was never so great as at present, and the opportunity for schools to train them will never be greater than at present. The schools may well organize intensive short courses in practical training, as well as other courses designed to advance qualified workers to positions of directive work in the factories.