If you have registered for the course, do not purchase these, since they are included in the course. 

These directories designed to "Quick Find" areas of interest in the code book.  They are heavy duty 8 1/2" x 11" mylar reinforced, three-hole punched, tabbed dividers to separate the  chapters and selected sections of the International Building Code (IBC) 2015 loose leaf edition.  Each side of each divider may be used for notes that relate to the particular area in the code they are located.