I used CC, earlier on to help NN build fluency, I also used some of the other tricks, such as the Whimpy Kid series. What I found useful, is to try to find mandated reading material, and dropped it down to two grade levels. NN found it much easier to read, especially if it was boring, and than she was more eager to read the material at grade level. I find this helps in reading speed, and the building of vocabulary, but not in word decoding skills and deriving meaning around words.