The solution lies in a "Course of Study." In the public school the system rallied around a common center--its course of study. All the agencies employed were to render that course effective. Out of a supplemental lesson system will arise conditions that will crystallize into correlation of departments, methods of promotion, a Normal Department with its commencement day, and, best of all, by the help of the home and the church, an atmosphere of study for the scholar without which a school cannot be. It is believed that such a course of study is practicable. Is it not thus that the modern Sunday school as a school must be improved? It is evident that the course of instruction in the Sunday school will be different from that of the day school. There, mental culture is sought; here, spiritual culture is the end in view. There, many are the text-books on diverse themes; here, one book and one theme. The Bible and its revelation must be the book and the theme of any supplemental lesson system. It may be taken as an axiom that that system will be the most efficient and acceptable which has the most of the Bible in it and whose teachings best mirror the Bible. The writer has prepared a series of text-books to be used as a supplemental course of study in the Sunday school. These books have been compiled in connection with his work as superintendent; and as they were completed they were tested in the Sunday school at Erie, Pa. The first one was written five years ago, and since then they have been continuously used. This school, as now graded, consists of the following departments: Primary, Junior, Senior, Normal, Reserve, and Assembly. The Primary Department has a four years' course and classes to correspond. The Normal Department has adopted the two years' course of study of the Chautauqua Normal Union. The course of study to which attention is directed is an eight years' course--four years for the Junior Department and four for the Senior Department. This course receives pupils from the Primary room at the age of about ten, and, after it is finished, passes them on to the Normal Department. THE BOOKS OF THE COURSE:[A] _Junior Department:_ First Year--Catechism. Second Year--Catechism. Third Year--Life of Christ. Fourth Year--Church History. _Senior Department:_ First Year--Jewish History. Second Year--Jewish History and the Bible. Third Year--Christian Evidences. Fourth Year--Christian Evidences. All these books are catechetical in form, simple in statement, and seek through the questions to give the theme a natural unfolding. They are printed uniform in series. The Junior books have each about twenty pages the size of the Church Catechism, and the Senior books have each about thirty pages.