common sense

I saw this in a secondary school (high school) in Singapore a couple of weeks ago and I thought I quite figured out why most of our children have very little or no common sense. A primary school (7-12 years old) is attached to this high school, so some may think that this is provided for the younger students to give them some guidance. I beg to differ. The younger the children, the less rules shall be imposed on them or the less rigid these rules shall be, so they learn on their own how to cope with daily life.