Any person is an experienced professional in several areas. For example, in math. But try to pass on this experience to a child. He will put you at a dead end with the first question: "What is a figure?"A training system is required for the professional transfer of knowledge - a set of methods, training materials and a clear plan of classes on theory and practice. You will receive all that at the NDL Instructor course.It is not enough now to know and be able to do. Now you need to teach this to another person.