Continuity mistake: When Gretchen leaves the school building at the end, she leaves the doors open behind her, but when she catches the helmet that Spinelli throws to her, the doors are suddenly closed.
Continuity mistake: After Miss Grotke writes "The Zen of Homework" on the chalkboard, she holds the chalk in her right hand, but it disappears in the next shot.
Continuity mistake: At the start, when T.J. tells Gretchen to save up her allowance so she can buy Ruddler's Red Rocket, Gretchen's helmet strap has vanished; then it reappears a shot later.
Continuity mistake: When Randall begs Gretchen to do his homework, Mikey says, "Tutoring is just another word for helping," and his backpack is green. A few seconds later, it changes to blue.
Continuity mistake: When Gretchen's mother first sees Gretchen doing homework, the paper in front of Gretchen has three lines on it. In the next shot, there is only one line on it; then the paper is completely blank in the following shot. Then, when Gretchen falls asleep on her desk, the paper has three lines on it again, and Gretchen's pencil has disappeared from her hand.
