In a French restaurant, you need to use knife and folk in order.
It's etiquette.
The other day, when I will park in the post office, a stranger stole my parking place. I think that is pretty bad manners.
My parents told me don't pass food with chopsticks.(from one pair of chopsticks to another)
When I was a kid, students have to raise their hands before they answer.
Recently the rule is changing. You can answer without raising your hand.
Teachers try to encourage students to be competitive.
Recently teachers try to make students motivated.