Having a clear understanding of professional development models is very crucial so as to create proper and engaging materials. The main job role of the instructional specialist is thus to understand the layers and associated needs of each profession so that he can develop a material that provides enough professional learning opportunities. The various PD models are pin-pointed to suit the need of a diverse set of people. It is important for the expert to pick a field and create learning materials in a such a way that the training seems pleasant and productive.