Tyler approaches Jordan at lunch while Jordan has headphones on. Seeing Tyler's approach, Jordan removes his headphones before Tyler calls his name. In the next shot (a closeup on Tyler), Tyler says Jordan's name again. In the closeup of Jordan that follows, Jordan's headphones are back on and he has not noticed Tyler's approach.
At the lunch-table scene between Tyler and Jordan, Jordan's left knee is up against his chest in closeups, but not in the first wide shot when Tyler approaches.
When Ariel reveals she's already experienced her first kiss, Amy's blanket changes between camera shots from up over her shoulder to beneath her arm.