Hi Andrew, That could be a long list if we looked at reasons students leave because of poor instructors. I did a survey of students' perspectives of poor instructors and you would be amazed with what the students had experienced with instructors. Reasons gave included sleeping in class, not coming to class, not have materials for class, not being prepared for class, poor attitude about the class, etc. Sounds more like students that instructors doesn't it? The sum of all of this is that poor instructors need to be removed or trained so they can improve. School administrators need to help instructors develop professional improvement plans so instruction will improve and students stay, if not they need to go. Gary