As an addendum to my earlier post, I sat down today to work out a system of accountability for my daughter and her responsibilities at home.
I have realized that negative discipline is WAY less effective with her. She doesn't see her role in the loss of privileges, and just sees punishments and lectures as us being unnecessarily mean to her. As an only child she has also been a little indulged, and she is showing a streak of entitlement, which doesn't fly with me. That's not how we roll.
So, rather than weekend TV being the norm and me taking it away for unacceptable behavior or not fulfilling her responsibilities, doing her stuff each week will earn her the TV time. She'll start on Monday morning with no minutes of TV time, and as the week passes, keeping up her room and schoolwork will earn her that time of relaxation on the weekend.
She is a visual learner. Things sink in better when she has a visual there to remind her. So I made a slightly more mature version of a sticker chart. Completion of each task earns her five minutes of TV time. If all is completed in a week, that's 2.5 hours of TV. Because she seems to respond better to positive reinforcement, I will also seek to "catch her being good" and supplement that time with some bonus time. Three to four hours of TV on the weekend is a good amount for her. It allows for her Saturday morning cartoon habit, with time left for a movie on Saturday or Sunday evening.
I'm hoping this will be a happy medium between me swooping in to take over and just letting her continue in this grade free fall.