Ben says "between the five of us". The correct word is "among" as "between" is specifically for two, be it two individual people, two sides in a war or two slices of bread. A student as accomplished and educated as Ben would know to say "among".
When Daric first hands Ben a cheat sheet, Ben crumbles the piece of paper. However, after Ben completes the cheat sheet and returns it to Daric, we see that the paper is not wrinkled, but neatly folded.
Early in the film when Virgil is standing in the strip mall parking lot, a wide shot shows two blank store signs in the background. In the close-up, he has shifted down the parking lot slightly, and is now standing further to the right of the signs. This can be confirmed by looking at the addresses below each sign, which have changed.
Right after Daric pistol whips the jock at the party, he raises his right arm and points the gun at the others. When the camera cuts to Virgil kicking the jock on the floor, you see Daric point the gun again; this time with his left hand.
While Ben and Stephanie are studying for biology, Stephanie recaps Mitosis and states the following phases in order: Metaphase, Anaphase, and then Prophase. It should actually be Metaphase, Anaphase, and then Telophase.
In the Las Vegas montage scene, while the protagonists are in a casino attempting to pull out their identification cards to prove their ages to a police officer, the badge on the officer's shoulder says California, while Las Vegas is in the state of Nevada.