What is the name of this movie? It's about a teacher who tries to teach values to their students. It is in a private prep school. The teacher has a placard over the door or high on the wall that he makes all students memorize. One of the students cheats on a test but the teacher can't prove it. Many years later, the student is rich & successful and challenges the teacher to another test, but he still cheats using a hidden microphone. The teacher asks him what was the quote on the placard and he can't remember because it's not in a book that his accomplice can access.
The movie has the feel of Dead Poet's Society, but it's not Dead Poet's Society. I tried to search for it but was unsuccessful: