I remember in my college classes several instructors that were just tremendous in getting us to understand the material in the course while other instructors, although experienced in the subject matter, had trouble getting the information into our brains! Now that I'm the instructor, I try to learn from my students. If the entire class in having difficulty with a concept, I know I have to try a different approach. I'm continually polishing my skills and making the appropriate changes. If an individual student is having difficulty, I will work with them one-on-one and change my methods to suit that particular student.