Continuity mistake: In the second gym scene, while Fran is talking to The Gym Teacher, Maggie's arms change from being crossed to hanging at her side between shots.
Continuity mistake: In the kitchen at the beginning, Fran pours milk into three glasses. After she fills the third glass, she starts to put the milk down. In the next shot, she is holding the bottle up to the glass again and pours some more milk before putting the bottle down.
Continuity mistake: In the first office scene, when Fran picks up Allan Beck's resume and pages through it she is holding the pages in the middle. When the shot changes to Maxwell and he says "Yes, but I'm still flammable", watch Fran's hands in the corner of the screen. She's holding the pages by the corner.
Continuity mistake: In the first gym scene, The Gym Teacher has a blue gym bag in her hands when she talks to Fran's face. When the shot changes and The Gym Teacher walks away the bag is suddenly over her shoulder.
Continuity mistake: After all the actors have left Fran and Maxwell start to leave the room Fran is holding a clipboard by the side, in the middle. When they go into the hallway she is now holding it by the bottom.
Continuity mistake: In the kitchen at the beginning when they are sitting at the table Fran says "Gracie when do you come up with these things." There is a note pad with a pencil on it in front of Grace. The shot changes and Fran is holding the pencil - the next shot Grace is now holding it.
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.