Goofs

In the record-smashing scene, as the students exit the classroom, Santini is shown walking down the hallway, but in the next shot he is still in the classroom giving Mr. Edwards his glasses.

In the climactic knife fight scene, there is a close-up of Glenn Ford walking toward the camera. Just as he gets almost even with the camera (only the left half of his body is visible), there is a noise to his left, possibly a clapboard, and he stops and begins walking to his left. But in the next shot from behind him he continues to walk toward Vic Morrow.

As Mr. Dadier is talking to the detective about his attackers, a few of the students are seen entering the classroom twice.

Set decoration includes a cardboard alphabet running across the top of the blackboard--something rarely seen past a third-grade classroom, let alone a high school.

As Professor Kraal escorts Dadier through the suburban school, the sound of students singing the national anthem is heard in the distance, louder in each succeeding scene, missing no verses. Kraal and Dadier are eventually shown ending their tour in the school auditorium, where they've joined the students in singing the anthem's final verse. However, in order for the two men to be present during the assembly while the students were still singing the anthem, the students would have to have sung the anthem over and over again for the entire time it took for the two men to tour the school.

In the garage scene, when Miller starts fixing the car, he says "nobody gives a hoot", but his lips indicates he really says "nobody gives a damn". The replacement of the profanity is made humorous by the director, who chose to play the sound effect of a car horn when the word "hoot" is uttered.

The elevated train structure is clearly shown as the end of the line. As such, trains would move very slowly either toward the end of track, or start slowly moving away from it. However, one hears trains moving loudly overhead at high speed with a rapid clickety-clack noise as if they were already traveling at high speed, which would not be the case for trains coming to a stop, or just starting to move away. Also, only the end cars would be heard here, not the entire train.

When the hoods break Josh's record collection, one of the kids starts playing a record and we hear music. During one part of the scene we see the phonograph arm playing the final groove of the record indicating that the record has finished playing, but we can still hear the music.

When the parked car is turned over by the hoodlums driving by, a securing cable is visible as the car flips.

Before Mr. Dadier enters the principal's office, the top of a movie camera can be seen rolling behind a high window of the office.

In the maternity hospital there is a sign reading "DOCTOR'S LOCKER ROOM" instead of "DOCTORS' LOCKER ROOM".