Used textbooks have been cleverly neutralized by the technique of bundling new copies with single-use codes for required online courseware. Adopting and requir

Used textbooks have been cleverly neutralized by the technique of bundling new copies with single-use codes for required online courseware. Adopting and requiring such courseware is somewhat abusive to students, but instructors are probably trying to save their own time and avoid reinventing the wheel. Personally I'd be happier if the textbooks and courseware access were sold separately.