HekArtemis
Fair warning for secular homeschoolers, this book is almost secular but there is the occasional not-secular phrasing, such as, "seventh day" and "created for" and things like that. It's not at all preachy, it barely mentions god or bible (except when describing other peoples schedules/routines/curricula), and it is only the occasional mention. But those mentions are there, so it is not completely secular.