Forget The jargon. Be specific in your comments. Parents may flounder if you deal only in generalities. Instead of saving, She doesn't accept responsibility. Offer a suggested course of action.
Parents appreciate being given some specific direction.
If Jane is immature, it might be helpful to suggest parents give her a list of weekly chores, allow her to take care of a pet, or give her a notebook to write down assignments. Keep a brief record of the conference. You may have reason later to refer to the record of what was said at the conference and what suggestions for improvement were made. Take notes as soon as possible after the conference while details are fresh in your mind. Ask for parents' opinions.