There's a huge spread in reading, with some 6 year olds scoring like an average 12 year old, and it still may not even be 99th percentile. My DD has similar scores ranging from the 93rd to the 97th percentile on the computerized test, and I've found that books that are about 2 grade levels ahead are the most appropriate for her. For kids that are really strong in vocabulary, they may be able to go up higher. If they are not teaching comprehension in the school at the right level, I am not really sure it's that big of a deal. My kids have never been taught at the right level but their scores keep going up. The most important thing is that she is given the opportunity to read books that are challenging enough.
