I know a lot of the schools over here have a voluntary 'Scripture' class - it used to be teaching kids about the Bible, but these days you can't do that so it's become more of a spiritual counselling kind of thing. My aunt used to do Scripture at her boys school, she didn't need any special qualifications. Maybe ask around the schools in your area to see if they do that kind of thing, and if you can sit in on a class or two?