Thanks Nan, I have done this also and it does work well at home. The real behavior issue is much more so my daughter than my son. I have resorted to basically keeping her with me as much as possible so I can guide her behavior. It is sad though and limiting for both her and me. DS's behavior is more typical ADHD stuff(though no diagnosis) but DD is getting way out of control. She has always been spunky but this is a whole different kettle of fish.
Glad to hear you give your son the chance to earn back lost priveleges as this is what I do as well. Thank you for your reply. This has just felt overwhelming lately and it is nice to hear from other parents.