And in the meantime, my DS8's highly academically successful school gives no written homework at all. His school day does run until 6pm, but there's more than an hour of free time every day for clubs, play etc. in there, and more than an hour of sports every day.
(In earlier years, the school day finished at 3pm and he did have some reading and spelling revision to do at home; now even that fits into school hours if he wants it to. Later - the school takes children up to 13yos - he'll have revision that won't fit into school hours, but they retain a no-compulsory-written-homework policy all the way.)
IMO, tidying his room and fitting in music practice gives him all the practice he needs at time management, and this is a policy more schools should copy! (Of course, when I was at school it was standard policy, but that's another story...)
