IMHO you need to talk to her parents and come up with a plan for this girl. If she is at a 5th grade English level, then she has the skills to get all the information she needs. She just is not interested in working any harder.
You are hindered by having to use just the booklets from your company.
She may need some other kind of tutoring/counseling program.
Good for you that you see she needs something else.
PS: she's wrong - beauty WITH brains is "in."