The opportunity that faces the church and the Sunday school in this adaptation is tremendous. Investigations of the past few years have demonstrated beyond a doubt that the time to let loose impulses in the life for the development of character is between the ages of fourteen and twenty, or the plastic years of early and middle adolescence. Recent studies have shown that the break in school life occurs at about fourteen and a half or fifteen years, and that the majority of cases in the juvenile courts fall in the same period. More souls are born into the Kingdom of God in the early years of adolescence than at all other ages of life put together, and the vantage ground of the church lies at these ages, the effort necessary being the minimum and the results being the maximum that can be attained. The problem of the church in touching these adolescent years is to make the right use of all the facts of boy life. Too long has the church looked upon the boy as a mere field of operation. Too long has she considered the boy as a dual personality and regarded life as both secular and spiritual. Today she is beginning to understand that all boyhood life is spiritual; that there are no secular activities in boyhood, but that every activity that a boy enters into has tremendous spiritual value, either for good or for bad. It is especially true in a boy's life that the spiritual finds expression through the physical. It should be true of all life, but a boy especially lives by physical expression. BIBLIOGRAPHY ON THE CHURCH Foster.--The Boy and the Church (.75). Gray.--Non-Church Going, Its Reasons, and Remedies ($1.00). Hodges.--Training of Children in Religion ($1.50). Hulbert.--The Church and Her Children ($1.00). IV THE SUNDAY SCHOOL OR CHURCH SCHOOL