I love the idea of these ... though I'm having trouble figuring out how many of them there are, what grades, etc. And some I've only found 1999 editions for. I wonder if there are History and Math equivalents to this. As a former public school teacher, I struggle with two competing desires: the first, to make my home school entirely OTHER (classical, Christian, different scheduling, etc.); the second, to find a decent public school curriculum for cheap (in this case, older suits both needs) and implement that as a "spine," rounding it out with tons and tons of lovely books, presumably picked out from those recommended by TOG, Sonlight, etc.