Does she have any volunteer experience? I used my background as a girl scout leader and a church camp manager and then some subbing on my resume. Any pertinent hobbies? Have her dig up every little detail she can think of--I even used my extensive travel experience.
Honestly, the fact that she's worked with kids for 20 years--kids of any age--probably means she can be trusted with them, which is enough, as long as she meets the educational requirements, which it sounds like she has. The fact that she owned and operated a business means she can be trusted to crunch numbers, which isn't even a requirement for a parapro usually anyway. It also means that she's at least semi-responsible. I think you just need to help her format it and then proofread it for her.