I can’t imagine this would help. I mean, it’s totally ridiculous and ineffective. There are so many tools these days that provide a way to get around parental rules. What are you going to do? Take away her computer and phone, too? How is she going to do any work?
No, it is as others have said and it is as you are doing. You need to support her, not punish her. You are now trying to understand what she needs to do and help her organize herself. I’m sure she hasn’t been slacking because she wants to. It’s probably a new school, and the social situation is all different, and she may not have the executive skills necessary to cope.
On the other hand, maybe she hates the school and wants to be kicked out so she can go to another school. Maybe you’ve already had this discussion with her, but if not, it wouldn’t hurt to ask her how she likes the school and if there are any social problems.
The best way to get good results is positive reinforcement. My daughter is 14, a freshman in a school ten times the size of her middle school. She is incredibly organized and works very hard and is highly motivated to do the best she can because she wants to get into a good college. This is not something we’ve told her directly. But she’s picked it up and bought into it. She’s got a 102 average which, apparently, will go up when adjusted for the toughness of the courses she is taking. And she wants to take every AP and honors and IB course she can put into her schedule.
We haven’t pushed her at all. In fact, when we tell her we are not pushing her and whatever she does is fine, she reads us the riot act about how important hard work is and sometimes I wonder where she came from, because I was a lazy SOB in high school. Ok, maybe not that lazy, but I never put pressure on myself. I did what I could do without working too hard, and I did just fine. My wife is the hard working one. So my daughter got that from her.
My daughter is almost always in her room, and she spends a lot of time on Facebook, but I really don’t care what she’s doing as long as she’s doing her schoolwork, which she seems to be doing. She’s a happy, entertaining girl with a lot of confidence in her looks and talent and again, I have no idea how that happened (given how I am the opposite in almost every way, and my wife is quite shy, too), but I am glad it did.
This is not to say what we did will work for everyone. But it can work. I could tell you about my son, who really does have executive functioning problems, but I’ve gone on too long. Well, one thing: you can’t keep him away from the piano and you can’t keep him from drawing in every spare moment, even as he watches TV. And now, he’s started (at age ten) communicating with a few girls in his class over the internet. They use Google Docs and “edit” each other’s work. It’s cute. But it’s also teaching him to type, which he has resisted for years. Amazing how friends (gfs?) can motivate you.