I am a mother of 4. My oldest two never "tried" me as some children do. When my 3rd child came along who will be 5 in January, I entered a whole new world. She is very sassy, smart mouthed, insists that nobody is "her boss". She is quick to disregard our authority. When told to do something her response is that she doesn't have to. She is very argumentative. She also displays a most offensive attitude at home and in public. Disciplines we have tried range from using charts that emphasize good behavior rather than bad to time outs to spankings. She doesn't respond to any of these methods.  I can see this child on a show similar to Sally Jesse Raphael, being sent to camp if I do not find a positive way to redirect all this "energy" and "strong-willed" personality she has.  I do not know how to deal with a child "trying my authority".  Recently my husband and I have had to set some new boundaries for her that include allowing her to watch ONLY those videos age appropriate for her, earlier bedtime than her older siblings, age appropriate toys-no longer can we allow her to play with things her 10 yr old sister can. We have also removed certain priviledges for several hours. She is in pre-k for 3 hours a day and this helps.  Would like more advise on how to handle her "fits" until she matures enough to realize this kind of behavior will get her no where.  Perhaps some new innovative ways to counter her attitude or different methods to try would help.  Thank you.