Funky....
Are you still confining her in an area with an open crate when you're not home? If so, and she's using the pee pads while you are gone through the day then that's wonderful. If she's not going in her crate at night then that's great, also. Now, if you're letting her run around in the house while you're not home, then she's definitely going to use the bathroom on the floors. When you get home from school is when you need to watch her like a hawk. I know it's hard, but that's the only way it will work. If you can't keep a constant watch on her, then put her in her area that you made OR put her on a leash and take her every where with you in the house. After my pup does his business outside is when he has free run of the room that I'm in. I think he finally got the message.
My pup started peeing on command ONLY when I started giving him treats. Those treats made the difference in his training. Also, one more thing about the leash. I hardly have to do that anymore. When I do use it like when I'm cooking and I want him where I can see him. I wrap the leash around a doorknob.
The thing is this, once they start going in the house and it's not cleaned up with a neutralizer then the smell is always there and it sets them off. You may need to get a steam cleaner and use Nature's Miracle as the cleaning solution. Don't ask me how to do that, but one other member mentioned it once.
Good luck...I know how tough it is, BUT you have 2 things going for you. She doesn't go in her area or her crate. That's a big plus! My pup is not completely housebroken either but I feel like it's going to happen. Well, I hope!