The correct answer to this open question is the following.
We are going to explain this concept in simple terms. The triadic relationship in teaching means that are three important components in the process of learning: the student, the teacher, and the content of the lessons or information to be taught.
This form of education exists for the following reasons.
1.- It is a new form to establish education in modern times.
2.- It wants to give a new platform of study in the classroom.
3.- It is more conducive to a better exchange of information where the roles of the three constituencies are very clear.
4.- It allows the student to exert critical thinking to demonstrate and exemplify the lesson learned.
And we can add a number 5, that would be that this form of education allows better interaction and feedback between the student and the teacher.