Then reading, Giving an A, I was at first reminded of the eternal stories (books and movies) of teachers who enter a challenging classroom of students whom everyone else has given up on (eg. My Posse Don't Do Homework) with the attitude that the students can and will learn and they achieve more than anyone else could have hoped for. As I read, it's more than just giving students an A with the expectation that they will do the work to maintain it but approaching every interaction with the idea that the other person (and yourself) has something of value to contribute to your relationship. It's taking the focus off the measuring stick and moving it to the relationship and growth.
Sky on Fire by Robert Couse-Baker
By focusing on what is working and valuable rather than what isn't, each person can change a small part of the world to unknown extents.