Soon after the film started, we heard calls similar to swans flying over, and these birds looked more like starlings.
Factual error: Keating’s verse quoted by Whitman is incorrectly quoted. The correct verse should be: "I heard my unfettered screams breaking through the top of the world."
Voices are out of sync: Keating’s lip movement did not match what he said when he ordered the students to tear up the verses in their textbooks.
Anachronism: Although the film’s era is set in the 1950s, the chemistry textbook "Chemistry: A Modern Course" students are using is the 1987 version of Robert Smoot.
Anachronism: "Literature: Reading, Fiction, Poetry, Drama and Prose", an anthology of poetry compiled by Robert Diani, published in 1986.
Factual error: Thoreau’s verse quoted at the beginning of each meeting is incorrect.
Anachronism: Many musical instruments were mistakenly used in the film in 1959, such as fiberglass tuba, metal drum stand, and tweeter. These appeared at least 20 years earlier.
John Keating asked the children to stand on his desk. He packed his things and prepared to leave the classroom. Then he stood quietly behind his desk. At this time, three boys stood on his left and no one on his right. In the next shot of his table, two children can be seen standing on the left and two standing on the right.
In the cave, when Nuwanda was talking to the girls, the lipstick on his right cheek was printed between different shots, and the position was constantly changing. The size of the lipstick was also different from the previous clip.
