That the Sunday-school has no relation whatever to vast numbers of girls in their teens is a fact apparent to any one interested in the girlhood of that period. And it is a fact of tremendous significance. It means that at the time when the religious sense is keenly responsive, when the mental faculties are alert, when the physical is asserting itself with all its power for good or evil, the girl in large numbers is not getting definite, systematic instruction from the best book of ethics, morals and religion that the world has known. She is not being brought face to face each week with questions that have to do with her own welfare, and that of the world, nor is she being led to think definitely of her personal relation to the church and its work for mankind. Unless she is in some way led to think along these lines all the myriad little interests that call to her from the outside world slowly crowd out the more real and uplifting thoughts and influences. Every one, even in mature life, needs to come regularly into contact with influences that tend to lift him up and woo him away from the domination of the petty and material, and even more is it needed during the years when character is taking definite form. No girl can afford to lower her ideals or even to allow them to become tarnished. Life apart from contact with religion in some form seems to do that. Men in later years seem often to recover the ideals lost during their teens; women seldom do. So even a glance at the problem shows one that the first thing for the Sunday-school to do is to establish a relationship between itself and the multitudes of girls in their teens. The best way to do this, as any teacher knows, is to keep a strong hold on the girls who have been regular in attendance up to twelve years of age. With these girls as a nucleus, it is easier to make definite effort to gain new members and to make the class so attractive that they will stay. When the teacher has resolved to make the effort to reach out for the girl who is leaving the Sunday-school in large numbers, the clear and challenging question, “What makes a class attractive to the girl in her teens?” immediately presents itself.