From the days I taught, I understood the books for group reading should be reasonably challenging, and this is where reading teaching should go on. But I always taught ks 2 so may be wrong about reception. Dd seems to be reading books a level below those she brings home when it is group reading and the last couple have def been in her book bag before. Should I be concerned? Comes in a week where words for sentence making (high frequency words) are also being sent home and are words that dd can read and spell with ease.