I agreed with everything mich said. Just to add my two cents. You may want to get a copy of Overcoming Dyslexia by Sally Shaywitz. She has descriptions of techniques to improve speed and oral fluency that you may find useful.
With more challenging material, it has been very helpful to have me read a page (or depending upon the level -- a paragraph or chapter) and then have DD read the same page over. As her reading has progressed, I have been able to back off of this but still have her read out loud. I can monitor if she self-corrects or if she makes one of those subtle mistakes that send her comprehension spinning out of control. I occasionally give her comprehension nudges -- i.e. telling her to look at a word again, correcting a verb tense or sometimes just telling her a word. Sometimes I give her a break and read a page or paragraph to get her back on track. We also use audio books as pre-reading. When DD knows the story, it takes off some of the pressure.
