I think that this is a big problem for most parents. Maybe all of us have experienced that after working hard for a long day, we hoped that children did their homework alone without parents' help,but they just wanted to play toys. When you criticized them, they responded that why aldults could watch videos on phones, but they couldn't do other things besides studying. Both of parents and children had a long hardworking day. So, if we want to discipline a child, we need to discipline oursleves first. We need to set a model for them to follow. As parents, we always ask teachers to teach our children to be excellent. In fact, most of the school time, children just gain knowledges from teachers. Their personalities are built at home or in society. Parents are the first teachers for their children. There is a saying goes that phoenixs were born from phoenixs, and rats' children are able to dig holes innately. If we do everything well, our children also can do everything even better!