I guess the big reason why I think I need SOMETHING is, if for nothing else, some guidance on what topics to cover.

For math, the path is pretty clear: counting -> adding/subtracting -> multiplying/dividing -> geometry -> algebra, etc etc.

But for other subjects, not so much. Like History, I can think of the wars, Civil War, WW1&2, etc. Oh, and there's things like the Louisiana purchase, and.... Yeah, I'm just bound to miss something if I'm going off of memory.