For Dyslexics, or any young person, recognising spellings can be very tricky. There is a fantastic dictionary called Ace Spelling Dictionary. This is quite a big dictionary though for young users.
I have designed this basic 32 page dictionary that shows all of the alternative spellings (graphemes) for the common sounds (phonemes) in the English language. This allows children to look at all the spelling options for that sound and hopefully find the correct spelling independently – supporting their self esteem.