Sounds like your daughter is going through a difficult period. It is very hard to know exactly what is motivating your daughter's tantrums without more context about her behavior in the past, so I think that you should consult with her teacher and/or school counselor to get some additional advice.

However, I do think that you will have quite a bit of success with your daughter if you follow a few principles: Set clear limits and consequences. If she is watching TV, let her know that she has X minutes to watch her show(s) and then it will be time to turn off the TV. Let her know that you recognize that she has had difficulty with the TV recently, and you want to help her with the transition. You understand how hard it is to stop doing something that you are enjoying (watching the TV), you have struggled with it, too. Consider positive reinforcement  strategies to encourage the behavior you want. Let her know that you will give her five extra minutes of reading time, cuddle time, play time (whatever appeals to her) if she turns off the TV without a fuss. In addition, remind her ten, five, and two minutes before her time is up with the TV that it is almost time to turn off the TV.

Also, do not be afraid to implement negative consequences, too. For a six-year-old, experts recommend a five minute time out. If she continues to throw and scream, you can double it. When putting her in time out, calmly explain what behavior triggered the time out and let her know how long she will be in time out. If she complains while in timeout, the length of the timeout period will increase.

Finally, be sure to plan "special positive" time with your daughter, as well. Many children who struggle with behavior, are tired, frustrated, and seeking attention from their parents. Spend 20 minutes whenever possible, playing with your daughter in a game of her choosing. Try to minimize criticism or complaints. Just let her direct the play. This time will improve your bond and help you to be more effective during the difficult moments.

Please let us know if you have any additional questions.

Best wishes,

L. Compian, Ph.D.
Education.com