Hi Virginia: You're right, preparation is very important. For instructors, that means time and effort preceding the class has to be allocated to make this happens. It's rare that a good teacher can just stroll into a class and "wing it". When a well prepared teacher is present, as students arrive, the teacher is available to answer questions, initiate dialog, create and strengthen relationships by visiting. Student's won't have to feel like they're bother or interrupting the hurried teacher scambling to get stuff together for the class. Regards, Barry