There are many alternatives. For instance, writing stories about teens engaging in community service and how it changes their perspective on life. Or creating stories about teens' creative pursuits, like a teen who is into art and discovers new ways of expressing themselves. These types of stories promote positive values and are appropriate for a wide range of audiences.
You could write coming - of - age stories that focus on the emotional and intellectual development of teens in a healthy way. Such as a story about a teen learning to deal with friendship problems or family issues through positive communication. Another option is to write fictional stories about teens in a historical or fantasy setting where they are heroes or heroines achieving great things, like saving a village in a fantasy world or making a difference during a historical event.