In our experience, we have seen that many people with dyslexia have the most difficulty with learning to spell and to get their ideas down on paper. At least with reading, the words are already there on the page instead of a person being faced with a blank page. There is so much to retrieve from long term memory - specific letters, how to form them and put them in the correct sequence for spelling, word order, grammar, punctuation, tenses - to say nothing of meaning, which is the main idea behind why we write in the first place.