Always, ask what is the economics of things. Full time teaching faculty teach 3 courses every semester, for it to make financial sense to pay them for full tim

Always, ask what is the economics of things. Full time teaching faculty teach 3 courses every semester, for it to make financial sense to pay them for full time salaried role. Trying to teach a course well takes at least 12-15 hours of work every week, if not more. That's already more than 40 hours per week. Add a few hours of service requirements to this as well. Where is the time or the mental energy to learn new stuff? At best they will supervise an undergraduate thesis or two every year, where perhaps the students will teach them some new stuff. It's only the gifted, who are able to keep up. The average faculty member just falls further and further behind.