Also, I know some kids that go to fancy IGCSE/American schools.
These are some of the nicest, most polite kids you will ever meet.
They are curious, ask good questions, confident, assertive and most of all very sociable.
That's the reason why our esteemed CS will tell us 'Spare the rod, spoil the child' and 'Caning is good'
All the while HIS OWN KIDS will never set foot in those same public schools.