So at one of the numbers cited in the OP, $3000 per 3 credit course. That's generally 3 hours a week for a 16-week semester. Which would be $62.50 per hour of class time. While 40% less than your $100/hour figures--it puts it in perspective, $100/course hour isn't actually an enormous figure. I guarantee those teachers making "$100/hour" aren't driving lamborghinis.