Dr Beers offers an excellent worksheet to help children focus their thinking on non-fiction texts. She has a similar approach to fiction.
I've suggested that, in order to benefit from this approach, children need to be able to read the words in the text. You can't read between lines without reading what's on them. Dr Beers has argued that weak readers are too often kept working at basic levels in a way that prevents them from learning to read beyond them. The solution is to teach these in tandem, building up pupils' knowledge of words and their structures, at the same time as enabling them to think about the broader purposes of reading. Unfortunately, teaching words and their structures is too often reduced to the most basic correspondence between letters and sounds, with no explanation of the complexity of English, and how it came to be as it is.