We were in a PS for 1 year. We are in an excellent PS with an excellent PTA - ethics and anti-drugs and anti-bullying etc were a huge part of the education in that school starting from K onwards - the PTA pushed the agenda and the admins supported it. They had constant education on ethics (doing the right things, not doing the wrong things, helping the fellow man/student, not being influenced negatively by others, standing up for your convictions etc etc) and once a month hour long events in classrooms to teach about ethics.
So, I think that in addition to what a parent can teach at home on these topics, the parent can work with the PTA to implement effective methods to teach ethics at school.
