How do I motivate myself to do homework besides the due date?

Sometimes listening to music helps. And maybe, take that you are always hungry to an advantage - so that every time you complete a certain section of homework, you reward yourself with food, and that might keep you going for a bit. Also set an area for just your studying - choose an area where you don't have many distractions and make that the zone for where you do all your studying and homework - as it kind of sets an environment that schools have (where you are set to be learning.) Hope this helps!

Maybe it's because your body is still developing, so you feel hungry...but if you're really very hungry and that made you can't concentrate in class or whatsoever..You should find the school nurse or tell your class teacher...