Hi Sharon: Yes. Even the most knowledgeable teacher can look like they don't know what they're talking about if they have not prepared adequately. Just some time, thought, effort, and planning is needed to prpare a game plan that the teacher can use to map out the lesson. Adjustments may be needed, but that's going to happen even for the most prepared teacher. Thta's why back-up plans are helpful. Students will appreciate the organized and prepared teacher and tend of offer a bit more respect for their expertise in preparing a well prepared class. Regards, Barry