Chapter 11 covered tools available to assist in threat modeling.  This textbook is a couple years old and software changes quickly.  Research threat modeling tools.  Select one and write a 2-3 page document that discusses the tool you found, how it is used, features it has available, cost, and anything else you may find interesting about the tool.  

Course text book:  
Shostack, Adam. Threat Modeling: Designing for Security, Indianapolis, IN: Wiley, 2014