There is a clear distinction between one who is supposed to know and another, usually a younger person who is supposed not to know. However, teaching is not necessarily the area of a special group of people, nor should it be looked upon as a technical skill. Teaching can be more like guiding and assisting than forcing information into a blank mind. If you have a certain skill, you should be able to share it with others. You do not have to get a certificate to convey what you know to them or to help them in their attempt to teach themselves. All of us, from the very youngest children to the oldest members of our society, should come to realize our own talent and abilities as teachers. We can share what we know, however little it might be, with others who have need of that knowledge or skill.