Found on a facebook repost from my friend ARQ from Alejandro Hernandez Reyes:
With this picture was an article of a mom who taught her son by circling his best work with a green pen, instead of marking his mistakes in red.
I liked the idea and started doing it today with Raccoon. Instead of focusing on his failures, we circled his successes and the change in his attitude was amazing. He couldn't wait to write his next number to see if it would be his best one yet. And it gave me the chance to point out what makes a number great.
Thank-you, Anonymous Mom, good job!