With my children, they have an extended school day (8:00 - 3:30) and then get home by 4. By the time they are done with homework, I feel like they need to relax. I will help with whatever things they personally want to explore, but I won't push them in any particular direction. On weekends, I try to find fun outdoor things to do, and also museums and such. This way they feel like they are not getting educated while they still are.:)