This is a hard question to ask without sounding like another over-inflated parent who thinks their child is a genius and why doesn't the blasted school notice.
Basically, the books that my DD is getting from school are very easy for her. In particular the Biff and Chip ones, which seem to be quite a lot easier than the non-fiction ones she gets (not sure if this is the level of language or her level of interest).
School have her on level 5. The other evening she was reading a Horrid Henry early reader out-loud to herself (in fairness, I think that this was a rather easier and shorter one than some others) (cue proud mummy moment because she said she was quite enjoying it, even though she was also in a manic over-tired state and declared she wanted to finish the book). She didn't get it perfect, but I did ask her about what was happening and she knew. Most often when she gets things wrong in her reading it is because she is predicting the story too much and so essentially reading too fast and looking at the first letters and not the whole word. When she slows down and reads, she can read it fine. So I do know her reading is perfect (obviously!). However, she can read the level 6 Biff and Chips with minimal faults already, and all of the Read at Home series (the old one for which, as I understand it, the 5c books are actually equal to level 7). She isn't particularly daunted by the number of sentences on the page, and had a really good stab at reading my 1967 ladybird version of Cinderella the other week.
So, my question is, does it matter? Should I just let her speed through the school books and then get onto what ever else she wants to read for the rest of the week? Or should I be talking to the school (and probably sounding like the aforementioned pushy parent)? I will add that I don't at all think that she is a genius, I just think that she seems to have 'got' the reading thing in the last few months and is on a roll at the moment.