Getting ready for teens myself, but am having practice runs as a result of philosophical differences between their mother and me.

Sinsull's right about the bereavement anger. Add to that the typical teenage angst and BOOM!

My quick thought is to lay out ground rules based on expectations and future goals. Recognize this is the situation you both have been handed and you both need to make the best of it. You might discuss your expectations for his performance in school, cleanliness and physical health. He may share some expectations of his own (lucky you). However, throughout the discussion both of you should somehow continue to realize the whole purpose of this exercise is to enable him to be a successful adult and your sole interest in a positive outcome for him is your unconditional love of your child.

Best of luck Morty.