At our home we have consequences for breaking school rules. If you get in trouble at school for not following the rules you will have a consequence at home. If the problem at school was bad enough that they had to go to the principal and he had to call me at work then there is deffinatly a problem that we need to address and take care of, i dont want my children being terrors at school and being labelled as trouble. so to prevent that i deffinatly agree that there should be a consequence at home and to let them know that i expect them to behave at school just like i do at home.