You can't decide that they will eat their vegetables.
You can't decide that they are going to be diligent in doing their homework.
And you can't decide whether they take an interest in what society shows them.
Yes, you can open your mouth, spilling out your years of experience, and you can make incentives like offering dessert when they eat their meals.
But that's all you can really do. If there are posters everywhere telling kids to jump off bridges, what are you to do? Stop your kids from looking at them? Just try to talk to them, explaining how big bridge is just there to get your money?
Anyone who has kids knows that they can't control them. You are very dependent on the rest of society behaving.