This process is called discipline. Discipline is not an effect. This process comes about through learning from and modeling after a teacher, coach, master or some other expert who guides and trains the person. It is important to discuss the need for respect of the institution, the adults attending the church service, the other children in Sunday school and the way to be a child of Heavenly Father by not being rude. It is amazing how well the Golden Rule always seems to apply when dealing with all kinds of situations and relationships.
Good manners express that respect.
Having good manners is a tool for each child. In both of these it is not only the need for children to acquire them, but adults must embrace them as well. Adults must exhibit respect and good manners towards each other as husband and wife and as friends to others, as well as towards children. Children are deserving of our respect and good manners just as much as a fellow adult. It is through that action that you, the adult, are able to be the example and role model the children need.