Teachers use fear to motivate and discipline their students. A couple of years ago I spent a few months substituting at a Christian Academy. I taught grades 3rd through 8th as needed. The younger kids at this school were disciplined using color coded cards.
Every day they had to go past the teacher’s desk and get a little colored dot in their book to take home and show their parents. Green meant that you had been good all day. If you accumulated a whole month of green dots you got to have ice cream with the principal at the end of the month. Red dots were the worst. If you accumulated more than two days of them you got to have a different sort of lunch with the principal!