The following videos, produced by Susan Barton, are highly recommended. It is vital that you become knowledgeable about dyslexia and that you encourage your student's teachers to watch these videos as well.
Begin your education about dyslexia with these excellent webcasts:
Early Screening for Dyslexia: The Why, When & How
This is an extremely informative, very scientific look at developmental dyslexia.
Additionally, we are members of the International Dyslexia Association, which offers a number of valuable resources.