SuZir...our easy child son, went difficult child for a year in high school around age 16.5. I believe there were a few different reasons why. One of which was that he never had normal sibling rivalry. His difficult child sister was always messing up. He seemed (and kinda was) like an angel and great student by comparison. Plus, he is the bio kid and she is adopted...maybe this played some role...I don't know. He was a good kid, but when he became a teen...I think it may have been almost too easy for him. And I think he developed a big ego. Then when we came down on him for being inappropriate, he acted entitled. I pulled the plug on that super fast (long story)...involved some major tough love. Today, he is super easy child...thank goodness. He knows better to be rude or disrespectful EVER to me or his father. And difficult child continues to be a difficult child. Very little to nothing sinks in with her.