Goodness - there seems like some shocking amounts of Homework out there for some
DD is 8 and in 3rd grade (actually almost done with this school year!)
Gym is 3 night/week from 4-8. Home by 8:15 or so then get a snack, occasional shower, quick read and lights out around 8:30-9:00. She wakes up anywhere between 7 and 8:30, so usually gets around 10 - 11 hours of sleep.
One of her non-gym night she has Scouts which goes until 8:30 so this is her latest night, my goal is for her to be in bed by 9:00 but sometimes they run late. No reading/snack that night and she is mostly cool with it otherwise she won't be allowed to go!
We don't have much homework, just a little on-line math, reading (her favourite anyway) and either a sheet of creative thinking which is fun or a project style task which she gets 2-3 weeks so can be done on the weekends. The other tasks all get done in the mornings. Neither of my kids are any good at concentrating after school! Schools set different amounts of homework - we are lucky that our school listens to the parents/research and doesn't set much. Lots of kids do extra tutoring outside of school too in our area - I don't see much point.
My main problem with her schedule is my 6YO DS

He really has trouble concentrating when he doesn't get enough sleep. He needs less than her but has issues winding down from any excitement. We have now worked out a schedule between us and friends so he doesn't have to be dragged out for her pick-ups and everything is working much more smoothly. Hopefully by the time his schedule goes later his older body can cope!