Continuity mistake: In the beginning, the kids are outside the school, and Mikey says, "Last?" But the sign says the fourth graders are right after the 3rd graders, right where they should be.
Continuity mistake: Near the end, Gus is standing between the two handball walls. He is looking back at TJ and Lawson, who are near the first wall. But as the camera pans out, TJ and Lawson have moved to the other handball wall.
Continuity mistake: When Menlo tells the crew about Randall's joke book, he loosens his tie, and it's still loose when he says "Indeed." But half-a-second later, as he walks away, his tie is back to normal.
Continuity mistake: When The Library Kid is telling her story to the gang, her flashback includes a visual of her walking into the kindergarten class. The kindergarteners shown are the same kindergarteners in the current timeline, however Gretchen explains that the kindergarteners used in the flashback are now in 4th grade. (00:03:15 - 00:03:45)
Continuity mistake: When The Library Kid speaks for the first time, you see a shot of the gang, T.J's hat and hair colour are mixed up.
Continuity mistake: When library kid sees her kindergarten class she's wearing a dress but when she runs into the library she's wearing a t-shirt and skirt.
Continuity mistake: The Library Kid says her classmates were savages. This is all well and good, except the kindergartners shown are the present day kindergartners.
