Factual error: This movie was set in 1954, but in numerous street scenes more modern "cobrahead" streetlight fixtures are seen. That type of streetlight was first introduced in 1957.
Factual error: During the fist fight in the school yard, you can see a 1970s car parked along the curb beyond the fence on the right side.
Factual error: The movie's set in 1954 yet in a scene in the principal's office with Coach Balbricker there's a pair of USA flags that have stars representing all 50 states.
Suggested correction: If you're talking about the 2 small flags next to the portrait, those are 48-star flags. You can tell because the rows are even, not offset. There's 6 rows with 8 stars in each row.