Remember you were once there also. TEST Test accounts ahead of time. Set up everything, check equipment, review materials, and relax for a few minutes before starting. This keeps examples similar and questions should be similar. If you don't know, say so and get back as soon as possible.
Some people learn through repetition.
Some people learn visually. Use meaningful elaboration. Very few change at first, followed by rapid increases, and all adopt. Transactional emphasizes means to an end. Look for trends.