On days that there is no sports or event to attend, we walk or ride bikes home from school. That gives them a little bit of exercise and "off time". (If we have something going on that evening, I pick him up in the car and save that 20 minutes). He gets home at 3:40 if we walk, 3:20 if I drive. We walk in, have a drink (snack if he wants it), we talk about school while I go over his folder for the comment page or whatever. Then, homework. He's in kindergarten and doesn't really have much of anything, but my standards are much higher than his teacher's standards, so I have my own little thing going on where I work with him for a few minutes on some things he needs to work on or practice (we do some writing while my youngest son colors, we do some math play, he reads to us a bit). Then he can either have some time to himself in his room, or go outside and play with his little brother and / or the neighbors.
If there's Kung Fu, sparring, or his Bible club, he does that and afterwards it's family dinner (dinner is prepared ahead of time). After dinner we go to the pool even if just half an hour (trying to squeeze that last little bit of summer out...), but when the pool is officially closed for the winter then I'll take the kids to the back road where I let him ride his bike and my 2 year old rides his big wheel or tractor without fear of cars. His martial arts practice days are 1 hour, but on the days that he's not going to practice he still practices 30 minutes at the house.
At about 7:15, he takes a shower while I brush little guy's teeth and cuddle him....then big guy gets out of the shower and brushes his teeth and gets ready for bed while I bathe little guy. We sit on the couch, cuddle and do family story time, a children's devotional, talk a couple minutes about the day, say prayers, and go to bed between 8-8:15. No later than 8:15.
Basically, he's got 4 hours to do homework, play, and eat. 45-60 minutes to do his bedtime routine. It's plenty if it's just routine and done, instead of wasting a bit of time wandering around thinking about doing something. TV is something they may watch if he's just inside playing with his brother and I'm cooking (Dino Dan or something like that for 30 minutes), but usually they don't watch TV in the afternoon/evenings. If he's eaten, teeth brushed, dressed for school, and we've prayed, then they can watch Curious George before we leave for school, but that's about all they have time for. TV or computer play are fine on weekends but there's just not a place for it (not that it's forbidden, just not a place for it) in our normal weekday schedule.