My DS is in Y1 and enjoys reading books in his head. He can read aloud with very good expression when he wants to but tends to mumble at other times. I think this is because he actually wants to read in his head so I have been letting him do this and then asking him questions about the story afterwards. His teacher says he must read aloud to practise his expression. At what stage will the teachers allow him to read in his head? I would find it hard to enjoy and understand a book if I had to read it aloud.