DS got expelled from private in Yr 2. Just a difficult kid (Aspergers) not violent or rude.
Types of discipline in yr1/2 - after school detention, lunchtime detention, behaviour charts.
He is now in public. Discipline is more age appropriate and understanding. Kids do not get away with being rude or violent, but they are more likely to have playground time restricted, parents called, see the principal etc. a boy in DS' class has just been suspended for throwing a water bottle at the teacher, so it isn't a free for all.