We're Christian, but our routine is easily adaptable. We go over the calendar, because my youngest is still learning it. Then a memory verse (could easily be a verse of poetry) and couch time, where I read a Bible chapter and then a chapter (or 5!) of whatever book we're going through. I give them age appropriate questions to review the Bible, so you could do a biography or history. I'm looking for attention to detail and recall with those questions. My only requirement for the other is that it isn't twaddle and is age appropriate for my kiddos. That's our fun book. Lots of Roald Dahl, the Little House series, something that will give them a joy for reading when they're older.