I'm working on a project to use the Bible to teach reading to Children. It's called Diamond books. Carole Leah has been working on this challenge for years, how to use Biblical stories and text to actually teach the reading to children. I know in our 5 yr old, who has been learning to read now for a couple of years, that the only real system out there en mass is the Oxford Reading scheme, a collection of over 100 books taking a child from beginner to advanced and everything