by Rabbi Chaim Morgenstern
The Chafetz Chaim writes that we cannot observe Shabbos properly without knowing its laws (Preface to Mishna Brura vol. 3). Similarly, unless we know the laws of honoring and revering parents, we will not be aware of the respective obligations of parents and children. In fact, the Yesod VeShoresh HaAvoda writes that we must set aside a regular time to study the laws of honoring our parents, since each person is obligated to know these laws and to keep them in mind constantly (Shaar HaNitzotz, end of ch. 2).
Parents do not realize that their children may not even know what is and is not proper derech eretz
Parents should also realize that unless their children's school has an organized program for teaching kibud u’mora, their child is not likely to be knowledgeable about these halachos and will be less motivated to keep them. When young children are disrespectful, their parents usually exclaim, "Where is your derech eretz?" They do not realize that their children may not even know what is and is not proper derech eretz.
Did the parents ever try to ascertain how much their children actually know about these laws? If children are not taught the laws, they cannot know how to fulfill them.
A Brief Overview of the Halachos of Kibud Av V’eim
The following can be inferred from the halachos of honoring one’s rebbi (Shulchan Aruch Y. D. # 242; see also Avos 5:9 and Shulchan Aruch Orach Chaim #170):