Andrea, There are several good computer programs. I like Lexia's "Strategies for Older Students (S.O.S.)".
Reading Horizons Software Program is good for all ages and is probably best for the more severe dyslexic student.
(Click on "Interactive software" and then "video reviews" at the bottom)
"The Language Tune-Up Kit" is also good, http://www.jwor.com/
Check out this website for more resources:
I hope this helps.