Describe what teachers and librarians each do and explain how both help people learn.
Teachers help you learn new things and answer your questions. Librarians take care of all the books in a library and help people find the ones they want.
Both jobs are about helping people learn, in different places -- a teacher usually works in a classroom, and a librarian usually works in a library.
Mastery looks like: They can describe what a teacher and a librarian each do and how both help people learn.
Common stumbles: Thinking a librarian only watches over books rather than actively helping people find and choose them is a common early guess.