The more experience young children have listening to nonfiction read aloud, the better off they will be when they need to read it themselves in the later grades. The challenge is finding nonfiction that is written at the preschool level. Non-fiction easy readers are one source but they are often very simplistic. An alternative strategy is to choose non-fiction that is more complex but be selective about what you read at any given point. The great thing about non-fiction is that you can browse through it and read parts of a page or a section of the book.