In my mind, Earth-Education not only contains the Cracktionary, but also that weird healthy superheroes' cookbook thing that someone posted awhile back, the Bat-math book, any number of goofy PSAs and Very Special Issues, and these Spanish books that I saw at Barnes and Noble's, in which Superman and Batman try to teach you Spanish.
Also, like I said, El Dragon is its greatest hero. :D He has to be! HAS TO BE, I SAY!