One problem with this type of idea is that kids think in very different ways than you. This question could lead to your son thinking you don't trust that he's w

One problem with this type of idea is that kids think in very different ways than you. This question could lead to your son thinking you don't trust that he's working since you're constantly questioning him. I've found I can usually tell when my kids have actually worked hard on something or slacked off so if they're slacking I find other ways of talking about it. I'm not saying this is a bad idea for sure but I've run in so many cases with my kids where my "clever" way of communicating with them came back and bit me in ways I never would have considered. And since they can't necessarily communicate things well it could fester or direct his thinking in directions you won't know about for a long time. Parenting is hard. :)