If I were you, I will:
1. Talk with her to understand her excuse or feelings about this: maybe she's not awake, maybe she doesn't like school or doesn't like to be with her dad;
2. Try to make her get the habit of doing important things on time: wake up, eat. go to school, go to bed. And warn her half an hour before;
3. If she can't make the time, explain her the bad effect;
4. Explain her seriously instead of yelling at her, since the latter will cause her rebell.
And most important, show your love. Maybe here brother now gets more attension is part of the cause that she feels depressed.
1. Talk with her to understand her excuse or feelings about this: maybe she's not awake, maybe she doesn't like school or doesn't like to be with her dad;
2. Try to make her get the habit of doing important things on time: wake up, eat. go to school, go to bed. And warn her half an hour before;
3. If she can't make the time, explain her the bad effect;
4. Explain her seriously instead of yelling at her, since the latter will cause her rebell.
And most important, show your love. Maybe here brother now gets more attension is part of the cause that she feels depressed.