well, have u talked to ur teacher yet? well, many general modern history textbooks on WWII have a chapter on propaganda and it should gove a general outline. are u focussing on any country and their methods of propaganda? also, if ur concentrating on WWII then how is that a construction of propaganda over TIME? how about picking one country (a major one like germany or britain) and then talking about the changing methods of propaganda in that specific country over time? although, if u choose to do germany and are laso doing germany for ur MH national studies (assuming that u are a "modern" student and not "ancient") then u will have to check with ur teacher for overlapping issues...