Yes, do have EXTRA-work, but in the school and supervised by a (different) teacher.
The problem with classic HOME-work was that, more often than not, the results would depend A LOT on parent/adult involvement, from no supervision, to light supervision, to prodding*, to downright the parent doing the work instead of the children.
Lower the ammount of EXTRA-work, supervise (by a neutral adult, i.e. a different teacher) to be sure the children does it, and offer a tiny wee bit of aid, just to unstuck the children if needed be, and get done with it.
That leaves more time either for the kid to be a kid (i.e. play) or for the kid to enrroll on certian extra curricular activities like sports, or music ( https://elsistema-org-ve.trans... ) , or arts, or computers (my case) , or "whatevur"
* During my eraly years, from preschool all the way to the end of 4th grade, I was in this group, I was smart enough (18~19 / 20 average subtrasting PE) to do the homework unaided, but too lazy to actually go and do it.