I am actually a guardian of one who I have been supporting for years now. Straight A student. I have introduced him to programming and learning from online courses. The kid governs himself bila kuambiwa and yet nobody kanes him. He just learns from my example and that of his mum.You don't have children. Do you?
If your kid is ill mannered, just look at yourself or the mom. Kids learn by watching what you do not what you tell them to do.