Tara, I believe most teachers come to the classroom already quite competent in their specialty area of expertise. As you imply, our personal knowledge about a subject really has little to do with the more important responsibility to convey that information to our students. Teaching (or facilitating) a class is work, and requires concentration on doing it the best we can to assure the students are getting the needed material. And being sensitive to how our delivery is coming across can determine whether students get that needed information or not. As a student centered teacher, it's likely they will. Barry Westling