Just one other thing: The comment about writing, difficulty coming up with what to write, is something Linda Silverman talks about. Kids who see in pictures can have huge difficulties turning their ideas into words. There are so many skills involved in writing, not just the physical act, but all the mental processes of translating ideas into words, that strongly visual dependent kids can be overwhelmed and not able to get started. Add timed situations into that and anxiety becomes a huge issue.
Not everyone believes in different learning styles but I have seen their impact. It's worth adding it to your list of possibilities.
