An instructor should always be well prepared for the subject being taught. This includes having a lesson plan (and following it), being familiar with the material, and above all teach in a manner that will interest the student. Instructors should not: just read out of the textbook, constantly sit behind a desk, say the words 'shut up' or not answer a questions from a student. Instructors should walk around the class while lecturing, ask questions during the lecture, use visal aids like power points as much as possible, get the students involved in group activities (which help develop critical thinking skills).