L.A.
Go back to the way you speak to a toddler.
"Susan, look at my eyes and listen with your ears. It is time to go and brush your teeth and then go to bed. Tell me what I just said."
"Thank you."
Do this with each instruction.. Until she automatically will do the things you ask.
The other thing is to not yell across the house.. Do not allow her to yell across the house. Actually walk to each other to speak...this way you know you each heard each other.
At 7 second half of the school year, she could be a little burned out with being instructed all of the, time.. You just need to retrain her.