In this department the classes should be organized, each with its own officers, chosen by the members; and the class should be consulted when a teacher is to be appointed, although the voice of the class in the decision should be advisory and not mandatory. Especial attention should be given to the social activities of this department. Each class should have its own gatherings, classes of young men and women should meet together occasionally, and a Senior Reception should be held at least annually to promote acquaintance among the members. The interest of the young people should also be enlisted in some definite form of service for the church or the community. 7. =The Teacher-Training Department.= The most promising young people, both men and women, should be selected at sixteen years of age--the time of promotion into the Senior Department--and should be organized as the Teacher-training or Normal Class. The best teacher obtainable should be assigned to this department. Often in the high school or some near-by college, a scholarly, Bible-loving instructor may be found who is willing to give a part of his time to the equipment of teachers for the coming generation. A text-book should be chosen from among those approved by the International Teacher-training Committee. No person should be admitted to this class who is not willing to give some time during the week to the study of the course. While the rest of the school may be studying the regular lessons, whether graded or uniform, this class should be at work with the teacher-training text-books. There should be thorough instruction with examinations looking toward a certificate of work done, such as the International Teacher-training diploma.[8] The course may cover two, three, or four years; and new members may be placed in the class at the opening of each year, to begin at the point where the class is studying, and to remain until they shall have completed the entire course. In a properly graded school after a few years there will be a class graduating from and a class entering the Teacher-training Department each year. This department should also include a Reserve Class, consisting of those who are ready to act as substitutes for absent teachers. If the uniform lessons are followed, the Reserve Class should study the lesson a week in advance of the school. Into this class the graduates of the Teacher-training Class should be placed, to remain until classes are ready for them in the school. In some schools the Teacher-training and Reserve Classes do not form a separate department, but are two classes in the Senior Department. But it is the better plan in a large school to establish the Teacher-training Department, with its own officers, thereby adding to its prestige in the school.