Regarding teenagers and how challenging they can be....I have a daughter who is now 17, I also have a teenage son 14. what I find worked well for me is as soon as they start screaming and yelling at you or being obnoxious, CALMLY, tho I know its hard to do say, I am not talking to you like that why are you talking to me like that. Each time I have used that expression, calmly and in a very soft voice, they actually take a split second and look at me, kinda weird BUT, then they seem to lower there voice, and tell me what is on there minds. Hope it works for someone out there. Put the owness on them, they are the ones with the attiude, and screaming back at them it just what they want. dont buy into it. It took me some practice to get it, but once I did, as i said it works like a charm