One of the most powerful faith formation factors in a teen's life is having a mentor-type relationship with an older Christian. In fact, in my experience, only parents active in spiritual leadership in their homes are more productive.
In my last couple of years as youth pastor I encouraged the older generation to make connections with the younger (and vice versa) as outlined in Titus 2. Initially, most people pointed to the worship service as being intergenerational. However, it soon became evident that very little connecting was taking place in this setting. Sure, several generations were sitting in the same room, singing the same songs, and listening to the same sermon. Sometimes a teen and an adult would sing in the same worship team or share responsibility passing the plate. But even then, no connection would happen.
What followed was a constant unnatural struggle to make intergenerational connections happen. What we discovered is that the structures most churches operate under prevent these from happening. For starters, we're simply not used to having different generations come together in significant ways, let alone share space together on equal footing. Our programs isolate us from each other. Scripturally, though, spiritual wisdom is to be imparted from the older, wiser generation to the younger, inexperienced.
So is this possible to happen in a significant way in the today's current form of church?