Corrected entry: After Mr Murdock punches Mazzilli, Emerson (Mark's English teacher) rushes in and pulls them apart, saying 'what's wrong with this school?.' Mrs Cresswood arrives and threatens her with dismissal, and only a few hours later we see Emerson finding Mark to tell him goodbye as she 'was fired'. There is no way a teacher's dismissal, especially on such grounds, could occur in less than a day. Teachers who commit major crimes would be arrested and escorted from the premises; for others, there is a long procedure which must be followed before the teacher loses his or her job. (01:17:45 - 01:19:25)
Corrected entry: When Harry is exposing Mr. Deever's letter about Cheryl Biggs (the pregnant student) over the air, he reads, "I have no alternative but to suggest suspension." Cheryl Biggs was expelled, not suspended. We know later in the film that there is a difference between the two when Harry asks his girlfriend why she was expelled for cutting class ("That just deserves a suspension, right?")
Corrected entry: Harry's parents knock on his door and say they are suspicious because they heard him "talking." Apparently they feel they have nothing to worry about when Harry is yelling, screaming, and whacking boxes with a golf club, near the beginning of the movie.
Corrected entry: The number of the mailbox that Harry picks up his mail from does not match the number printed on the letters he received.