I have never taught at a Chewyfat school, but I have known quite a few teachers who have had that misfortune. As far as I know, Chewyfat's textbooks are not "child-friendly" and teachers are not permitted to speak to parents. Teachers are disciplined if they do not strictly adhere to the Sabis system, so make sure that you are on page 44 of the textbook and don't turn to page 45 until you are told to.