When Jason walks across to help Layla at the service project house, he seems to skip through time from one side of the room to the other.
During the scene where Jason asks for Paul's help moving a couch, another take of Jason's line was used. If you look closely before he turns around, you can see that it doesn't match up completely.
Before Mr. Blayton suggests they remove Marcus from the scholarship consideration, you can see lights reflected in the door as the man enters the meeting late.
When David opens the door to his house to let Jason in, you can see the boom mic in the glass reflection.