DD (5, in Reception) has been reading Green books for a few months and is fluent with them the majority of the time. Her teacher wants her to stay on Green for now, which is fine, but we've run out of Reading Chest books she can read (or will, at least, as she's not interested in the 'how to build a tamborine' type ones they have). If I switch her subscription to Orange are they going to be really hard? I'm guessing there will be sounds/words she hasn't been taught to decode yet? I don't want to put her off but I equally don't want to lose momentum as she's absolutely loving reading at the moment.