In the chemistry scene where Scott tells Kate he is going to be with Alex again it shows him briefly scratching his nose. While he's scratching it the camera view changes and his hand is suddenly back at his side. It would be much too hard for him to put it down so fast.
Although Beth is described as a vegan, it is implied in one scene that she consumed pizza and frosting, as well as shown eating a piece of a milk chocolate bar (all of which contain milk, a non-vegan ingredient).
At John's party when they are watching the video it shows scenes from where John asks Kate to be his girlfriend and gives her the watch but none of the other girls knew about this until Kate shows them the watch so where does the footage come from?
When Kate is talking to John with the Webcam, you can see back of her laptop with the web-cam on it while she says "I want you to wear them" then when it goes back to her but is facing the screen on her laptop there is no web-cam.
(at around 9 mins) During the gym scene, you see Beth, Heather and Carrie sitting down after Coach Williams says "We all hate each other". As the scene cuts back to the coach who is assigning the girls to their volleyball teams, you see all three walk up behind her, and go sit down to where they were already sitting a second before.
When John is shown in the locker room he says, "Let's just say at tonight's away game, I'll be scoring more than baskets!" and then does a dance. When Carrie is showing the video of this to Kate, he says it differently and does a different dance.
John scales the balconies to get to Kate's room, so he must be on the same side of the building as she is. He comes out of Coach Williams' room on one side, and then he goes into a bedroom on the other side of the hall.
In the hotel, Kate tells John she is 3 doors down, and he sneaks int the coach's room. After getting caught, Kate "made a mistake" and it was actually "4 doors instead of 3." However, her room is diagonally across the hall from John's.
At the end when Scott and Kate are talking, you can see a black man wearing a yellow shirt with what seems to be a bandaged left ear pass behind Scott. The scene the switches back to Kate, then when it switches back to Scott, the same guy passes behind him again.
When John Tucker is outside Kate's house talking to her on the phone, there are two large balls in Kate's window, a yellow and a red one. During their conversation not only does the yellow ball completely disappear but the red ball moves from one side of the window to another.
During the beginning credits, it shows Kate watching a game. Watch the scoreboard carefully. When Kate is pointing where she is sitting on the bleachers, the scoreboard says 35-23. John then scores, making their score 37-23. The game continues and John makes a 3-pointer, meaning the score now 40-23. When Heather is thrown up during her cheerleading, the scoreboard says 37-23 with 11.7 seconds left of the game. The next shot from afar shows the scoreboard having the score of 39-23 with 0.0 seconds left of the game.
When John pulls up to Kate's house and Kate threatens to call the cops, the order of the girls in the window changes. At first Carrie is on the left then Kate then Heather then Beth. Right after the order changes. It is switched around.
In the beginning basketball scene, about 4 minutes into the movie, Carrie is shown talking about the cheerleaders to her camera man and is wearing a white blouse over a blue shirt. Seconds later, when the cheerleaders are shown dancing, in the background you can see Carrie holding the camera wearing a blue/dark blue striped t-shirt.
When John jumps over number 20 (for a dunk) during the Eagles vs. Kodiaks game, it pushes the player's sweatband up on his FOREHEAD. When it shows the player standing up after the hit, he pushes the sweatband off of his EYES.
In the scene right before the hotel, Kate says that they just won the semifinals, which means playoffs. Then at the hotel, the head coach says he is not equipped to deal with something like that "right before the playoffs."
In the detention scene, Scott's laptop is open. When Kate says "shes hates to miss a moment of being detained," Scott slightly closes his laptop. The next shows the laptop wide open. After Kate sees John outside, the laptop is slightly closed again. When Scott describes the reactions John gets from girls, the laptop is fully closed. The next shot shows it fully opened and then he closes it.
When John is being pulled down the hall of the hotel by his ear he has his hand on his behind because he is wearing a "thong". When he stands still you can see that the "thong" is a bikini then changes to a thong at the basketball practice.
In the scene when Beth, Heather and Carrie are fitting Kate with the "boob" cam and briefing her before her date with John, Kate's robe is on both of her shoulders, except in one shot when it hanging off of one of her shoulders and then it returns to cover both shoulders in the next shot.
When Kate, Carrie, Heather, and Beth are on Kate's bed eating all the junk food there is one scene that shows both peanut butter and chocolate icing in front of Beth, then in the next shot of Beth the chocolate icing is completely gone from the shot.
When John is receiving his Teen Awareness award, he is shown from the front holding the plaque in his hand, right side up. The shot cuts to a shot from behind, and you can clearly see the mounting slot on the back is on the bottom, which means he is now holding the plaque upside down.
During the scene in gym class where the girls are getting ready to play volley ball, the coach puts six people on one side. Then she calls only for Beth, Carrie, Heather, and Kate to be on the other side. However, when they get into position, there is some random girl on the team not called.
When the girls meet for the first time in the A/V room Beth sits down and looks at the computer. Then the camera flashes to Carrie. Carrie tells Beth to turn off the lights and when it goes back to Beth she is standing up looking around.
(at around 1 min) When John is playing basketball and Kate is a cheerleader, the countdown time reads 41.5 seconds to the next period. However, more than 30 seconds passes and yet when the countdown timer appears next, the timer reads 16.1 seconds; the man holding the camera and the woman beside him disappear from the scene entirely, even though they were right behind John; and the coach has also moved approximately 10 feet from where he was while telling John to get in the game.
When Beth's skirt is caught in the back of John's jeep, we see her leave the skirt hanging from the trunk. When John drives off, however, the skirt is clearly wrapped around the back left tire, as it flaps with the motion of the wheel.
During the scene where John is playing basketball with a thong on, the camera shows different people watching. In one such shot while focusing on a character, they show a door with a rectangle window. As they do, somebody peeking through the window immediately pulls their head out of sight.
When John is on the sideline waiting for Kate to agree to go out on a date with him, there is a defender within 3 feet, and John does not dribble within five seconds, thus making it a 5 second violation and a turnover.
When in the end at John's party, the girls show their homemade movie to the audience. There is a shot from the yacht-date, which the girls were not able to film because they were stuck in a small boat far away from the yacht.