A third group of instructors are adjuncts who teach at three or four local institutions and are reliant on the lecture slides the publisher puts out to accompan

A third group of instructors are adjuncts who teach at three or four local institutions and are reliant on the lecture slides the publisher puts out to accompany the course textbook. That's the reason the textbook racket works at all. You want to improve things, you have to improve working conditions at second-tier colleges.