Just got back from soccer practice... did a TON of sprints, because I lost most of the competetive drills we did, then one time my team couldn't get it all done in the time, then it happened again, then we finally got it done. ANYWAY, sprints aren't fun. You really need to push yourself in order to get anything out of it. If you're not near vomitting, or your legs aren't on fire, you haven't been working long enough/hard enough. My suggestion would be this: day 1, light upper body
heavy lower body
day 2, sprint cycles (pick a distance from 40 to 100 meters, then sprint it, walk it, sprint it, walk it, until you can't do anymore, then do one more. Then another. Then you're done.)
light lower body
day 3, rest/stretch
day 4, plyometrics
heavy lower body
day 5, light upper body
day 6, sprint cycles
day 7, rest/stretch
Make sure you're lifting and sprinting correctly. Have someone watch or spot you in the weight room or wherever, and try to either film your sprints or have somebody knowledgable watch you. Make sure to put together a sensible lift schedule, don't just do power squats and calf raises for example. Talk with your school's gym teacher or someone who could actually help you get a good set of lifts (no pun intended

)
DRINK WATER AND EAT WELL TOO. Eat protein right after you workout, complex carbs every night before a workout.
Try that and tell me how it works out. If it's good, I might follow it loosely myself

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