Child Education:How far should the School go?

I just witnessed a rather disturbing scene and it got me thinking...
A mother found out her daughter has been fooling around with men. After insulting and calling the girl names,she drags her to school and reports the situation to the principal. She tells the principal the daughter is a disgrace and they have done EVERYTHING to discipline her to no avail.
This what amazes me.. She tells the principal he has their full support to met out any form of punishment he deems fit on her. She even tells him to disgrace her publicly before the whole school and let then know she is a prostitute...
The principal assures her he is going to ensure she is punished.
Now I won't want to go into what the principal did because that makes the situation more complicated.
In this case I am asking the question, what is the role of the parent...
Is it up to the school or teacher to inculcate morals in a child?
I personally believe train up a child in the way he should go, so when he grows up he will not depart from it...
Who has to inculcate basic moral values in our children?
Am Thinking...