I didn’t mean to suggest that limiting a course to one source is a good idea or commonly practiced. Rather, what I meant was that a course needs at least one good source of relevant material that won’t run out, as a base to which other things are added. In my experience, almost all courses have something like that, and instructors supplement the main textbook to varying degrees.
I didn’t mean to suggest that limiting a course to one source is a good idea or commonly practiced. Rather, what I meant was that a course needs at least one good source of relevant material that won’t run out, as a base to which other things are added. In my experience, almost all courses have something like that, and instructors supplement the main textbook to varying degrees.