No i don't have children there... and what curelty is that to have 13yr olds to stand for 3 hours... if you were in the UK or States.. you could sue them for such punishment...
No child.. no matter how naughty.. deserves treatment like that... seriously.. what is this kind of punishment really going to teach them...
Punish children by getting them to work.. that is what they need... and no child is that naughty to get punishment like this...

Never say Never for fear of Forever!!