I just thought of something I wanted to add.  Trevor has amazed me with some of the words he can read by sight.  I thought "sight words" came a lot later in the reading process.  Words he knows by sight (without having to sound them out): duck, cat, dog, a, can, little, is.  I think that's all of them.  I may have missed a few.  I LOVE these words because it makes him so happy when he can just run right over them without spending time on sounding them out.  He's amazing!