My kids are talking back to me now every time I try to lecture them when they did something wrong like spending a lot of time out with their friends, missing their curfews, failing quizzes and not paying attention. I don't really scold them because I am a very calm individual but they still talk back to me as if they know everything already. They just won't listen when I tell them that I don't want them to talk back to me ever again because we can converse in a calm manner. I don't know what's happening to them because they don't really open up to me. I'm going crazy parenting them. Any advice?