As a teacher I have discovered that this is non-negotiable. Kids have an instinct for when they are being abandoned. Being a person who matters means that other people care about you and are willing to spend time on you.
I've seen kids who were acting out, totally lost find the thread again because they discovered that someone cared what happened to them. Someone cares what they do.
That alone will make you want to do better.
muurahainen

