What age group do you teach or are you looking for materials for all ages? For which jurisdiction are you teaching (that can be important)? The antiochian archdiocese has put together a comprehensive curriculum and the web address has already been posted. I find some things lacking in there, but that's a discussion for another time. If you would like, I'd be more than happy to discuss with the Sunday School teachers at my church what they use (we're Antiochian so I'm pretty sure they all use that curriculum, though others do other things). Let me know what age group you are interested in. Also, there are some materials in Light n Life that may interest you.