I believe that there are two different values in his coursework, theory and practice. Some scholar believe that previously built theory is necessary for the practice. Another school of thought is that theory can be built form practice. However, theory can be build inn both way, it depends on the case and subject matter. In both ways, scholar/practitioner can formulate a theory. To cluster a new theory, we need to emphasized on practice. For example, Dugan's nested model theory shaped by an incident. Dugan formulated this theory from a racial confrontation in school. Dugan says that issue specific conflict are analytically the simplest and most frequent types of conflict can occur between or among individuals or groups of any size. Issue specific
