Syllabus
Secondary Sources
These are what would be the lectures in a live class. I have written most of them, but I've also used essays written by others, especially those done by Lynn Nelson and Steven Kreis. Taken together, these constitute your online "textbook".
The Secondary Sources provide a common core of historical writing for the class, but you should not regard these as being either complete or comprehensive. Expect to supplement them with secondary sources of your own. An old college textbook would be good. If you can't find one at a used bookstore, any college library will have some in their stacks that you can check out.
You might also consider getting a survey book for the major areas of the course: one for ancient, one for medieval, and one for the Reformation era. This is a larger investment, of course, but good used books can be found online for very reasonable prices. I suggest the more detailed books not because you are going to read three additional books but because you can use these as reference books, consulting them on specific points. Very often, because they concentrate on a narrower period of time, the explanations are livelier and clearer.