Class time should be a great time of interaction between students and teacher. The advantage of a good lecture over printed material is the lecturer can adjust

Class time should be a great time of interaction between students and teacher. The advantage of a good lecture over printed material is the lecturer can adjust to the needs of the class. This requires much more than asking for questions at the end. Indeed, I think the middle ages were even better than some lectures today because you could watch disputations and see how arguments were made and countered.