When I was beginning in ministry (I was a student ministry intern), I learned a valuable principle in raising up and training new leaders. Once you have either identified potential ministry leaders or someone has expressed interest in leading,serving or volunteering in a ministry area, here is a process in passing the batton so that they are ready to begin ministry. This might be stating the obvious, but it has been helpful to me:

1. I lead
2. I lead, you watch
3. I lead, you help
4. You lead, I watch
5. You lead

Now obviously in there are conversations, reviews and ways to improve. Hopefully that is helpful in thinking through a system and process for volunteer and leadership training.