Wonderful article (written by a dyslexic) for educators and parents! Although including an excerpt below, this is worth the full read!
EXCERPT: When dyslexis don’t understand, they are often too ashamed to ask for help, because they are confused as to why they are finding it difficult or why they can’t understand or complete the given task.
Praise the positive, tell them which bits you like, ask what bits they feel need improving. Only then gently question and coach them on how they could improve. If you push too hard you will break them not because they are weak but because they are too strong for their own good, creating barriers to protect themselves, that will eventually become their downfall.