These essences are often the major points we are taught about an educational theory. The stages usually define one set moment in development and then progress to another level or stage, providing a well structured model. Not all the theories are stage theories. This model shows how educational theorists can be described as addressing one of the four major domains of human nature and how these domains interface. Practitioners of theory will be italicized .
Practitioners vary from theorists in that they use the theory of others in application.
The integration model takes aspects from the traditional model and combines them with integrative aspects of theory. Not all theories fit into one, or any, particular domain. There are several major theorists who have produced theories that combine different aspects of human nature and education. These are the integration theories. They have aspects of the different domains within them.