Continuity mistake: After Dawson and Eve check his locker to see if the PSAT test was returned, they then start talking in the hallway next to his locker. Just as Eve says "Tell me who you think it is", there is a shot of her from the rear as she turns around to face Dawson with her arms crossed in front of her, and down by her sides. The next shot of Eve is from the front, as she says "Whoever you were just thinking of"; and suddenly her arms are at an angle away from her sides with her hands on her hips. Then the next shot of Eve is from the rear, and again her arms are straight and back down close to her sides as she says "It is". Then the next shot of Eve, again from the front shows her arms back out at an angle again with her hands on her hips as she says "Simple and obvious". There was no time for her to have moved her arms and hands during this scene, the transition was too fast. Apparently the shots of Eve from the front, and from the rear during this scene were filmed at two different times.
Continuity mistake: When Andie is doing sit-ups in the morning and practicing for the PSAT, she is listening to the news on TV. The news anchor mentions the author of the popular book "Cracking the PSAT". She says 'PSAT' not 'SAT'. But Andie immediately says something like "Way ahead of you", and holds up her copy of the book. On the cover, it says "Cracking the SAT", not 'PSAT'.