Franny and the Professor - S3-E2
Continuity mistake: At the end of this episode Fran is on the phone with the people from Jeopardy saying she only got 5 boxes of the rice-a-roni but when they show her again talking to Maxwell, Fran now has 6 boxes of rice-a-roni.
Answer: Mr. Sheffield needed someone to manage the kids, not necessarily babysit them. Brighton was a Bart Simpson type, Maggie was shy and awkward and Gracie had personality issues.