In preparation for a workshop I did recently on mentoring teenagers, I googled "mentoring older youth" to learn about current research and practice. Virtually all of the links that came up made the assumption that older youth were troubled youth, or high-risk youth, e.g., "juvenile delinquents," pregnant and parenting teens, youth in foster care or with parents in prison. What is that about?!
It's ageism, plain and simple. There is such a pervasive belief that teenagers are not to be trusted, are "screwed up," are something to be avoided or "dealt with" rather than that they are creative, ever-changing, exciting, cool people with strengths and expertise. You see this not only in the research that is conducted but also in the news, movies and TV, conversations with friends, family and neighbors, as well as where we spend our public dollars (youth intervention versus youth development).