Teaching empathy key to helping sibling discord

"My 9 year old has become a real "meanie" toward his 6-year-old brother. He mocks him, teases him and calls him names. Whenever he is with friends he leads them in poking fun of things the 6-year-old cannot do yet. He hurts his brother's feelings and makes me angry. Why is he like this? I have considered sending his friends home when he does it, but don't want to make him more angry at his brother. - Mrs. S , Anna Maria"

Answer and full story in Bradenton Herald Article

Empathy is a core anger management tool for children and adults alike. Resources to learn more about empathy:

Taming The Anger Bee newsletter article (pdf file)
EBook: Anger Management for the Twenty-First Century