My school schedule this year is totally hectic and chaotic. I'm a senior in high school, taking 5 college courses, so I know that I am going to spend four to six hours a night doing homework (just the way life is, sadly). However, I'm pretty good at waking up in the morning, so I'm trying to develop some semblence of a training schedule that involves:
Waking up about forty minutes before I normally would, to do general fitness, such as sit-ups, push-ups, wall sits, stretching, some weight training, etc. Just general conditioning in the morning.
Then after I get home from school I'm either going to do all my homework right away and try to train for a little while after I get done, but depending on the work load, that might not always be possible, so another option is simply to do two to three hours of homework, take a break, train for a little while, and then go back to doing homework after that. I'm not sure how it will all work out yet, but hopefully I can balance both. Good luck to you!