Welcome, Motherof4. Big warm hugs for your hurting mommy heart. 
I think Roxona and Michele gave you some sound advice. The only thing I can add is please remember that CPS wants to reunify families as much as possible. Please try to remain calm and focus on how you can get control of your own anger. Please don't take that comment as a judgement. Everyone here has been furious with their child/children at some point. Many points. We totally understand. Kids have a way of learning the exact thing which will make an authority figure angry, and then they do it. Watching an adult get angry gives them some perverse power.
The only way YOU can make a change for the better, is for you to take charge of your own anger. It isn't easy, but it can be done. You could go to the library and see if they have dvd's or books on anger or parenting. If they have a copy of The Explosive Child , it is probably checked out. Honestly, that book was the best resource other than this parent discussion forum that I found. I thought it was far more helpful than any therapist or parenting class. For your immediate purposes of showing CPS that you are serious about improving your family life, I would check to see if your city or county offers parenting classes. You are not the only parent struggling with a difficult teenager.
