I know your problem and here are two options that always helped me:
1. Have some friends or your parents at your side while you do your homework.
talking about your thoughts keeps you focused.

2. What XsGames said. Thats a really good system.

Ask your mom if you're able to stay at school, if she says yes, go to the library where there is no distractions. I've been through the same shit and I stayed at school for over 2 hours after school was dismissed.


Took a while but it got my grades from D's to B's and I passed 7th grade.