School is your child's only job. She needs to be told she needs to work hard at school because that is her only job. She is to do her best each day. And mom, as long as she is really trying.. do not worry about the grades.
How long does it actually take her to do her homework.. this should not include potty breaks, snack breaks and fit throwing. The actual minutes each night. If it is more that 30 min. per each subject.. figure out why. See if it is one subject or all of them.. If it is longer than 30 min. in a subject or all of them, speak with her teachers and let them know.
Our daughter always took advanced and accelerated classes, but she was willing to do the work.. Once she was in 3rd grade, we made an agreement. As long as she did her work and got up without complaints in the morning.. SHE could decide when she was going to do her homework..
Sometimes, she did not begin her work for an hour after she came home, sometimes, not until after dinner and sometimes, right after she got home and had a snack.
She learned pretty fast that staying up late alone.. is not fun.
She also learned this was not my homework this was her homework. If she needed help, assistance or supplies, she needed to inform me.
There were parents at her school who really disliked the homework. Their children just refused, threw fits and could not get the work done. It was a battle for them almost every night.
It was suggested to them, maybe it was just too much for their children and they should consider the regular paced classes. They were learning the same things, just at a slower pace. These students were given time to at least start their homework, most finished it in class.
Maybe you could mention this to your daughter. Maybe she feels overwhelmed by all of the work. She may be willing to move to the other classes until she can keep pace.
I was a child of divorce and I will tell you, I lived with a lot of stress as a child. My parents argued about all sorts of things. I had a hard time concentrating on what I needed to be doing. I became depressed. My father complained about my mother and my mother complained about my father.
Remember you are both her beloved parents. She loves you equally. She is part of both of you so when you say things about or criticize her father, she feels you feel the same about her.. Same goes for her father.. Each time he says things about you, he is making her feel like it is about her too.
TRY your very best to stop the arguing when your daughter can hear. TRY to not blame situations on him. Protect her from the ugly side of your relationships. It is going to affect her emotionally and her self confidence.
It is a distraction for her at all times.
I do understand the choir practice seems to be a good thing to hold over her head, but if it is only once a week and her only extra activity outside of school, I would hesitate to take that away. Maybe she needs instead to do extra chores on the weekends.
Parenting is so hard. Your daughter is obviously struggling with something. She is throwing fits at home because she has to hold it together the rest of the time around others.. What is it she is so frustrated, angry or worried about?
If you cannot get her to tell you.. take her to a therapist.. She needs to figure this out.