Going back to school after long period of time is really difficult. Things take time to get adjusted.
Every parent put all their effort to give their kids the best education.
That's the line which says everything.
Parents wants better life for their children , but children sometimes take it negative.
May be its their age that brings those temperaments , I can see that in my son, so I have changed my strategy - enforcing discipline and motivating or encouraging at the same time.