I just completed my class to become a certified instructor this weekend. Here's a link to find a training counselor in your area.
http://www.nrainstructors.org/searchcourse.aspx You can also call the NRA at 702-267-1430 to find a TC in your area. You're going to need a TC that will give you the training. Mine, had our class meet him to shooting qual and show him that we we capable of unloading/loading different actions (SA revolver/DA revolver, and semi-auto) or firearms. The classes may not be available to easily (I know PPOTH is very hard to come by right now and you have to go through the class as a student before you can sign up for the instructor class. Good luck and let me know if you have any more questions....